Director, Center for Fundamental Physics, 2017 - present
Board of Trustees Professor in Physics, 2017 - present
George Vasmer Leverett Professor of Physics, 2003 - 2017
Chair of the Harvard Physics Department, 2000 - 2003
Professor of Physics, 1987 -2017
Associate Professor, 1986 - 1987
Assistant Professor, 1985 - 1986
Research Assistant Professor, 1982 - 1985
Research Associate, 1978 - 1982
Visiting Scientist at the Max Planck Institute for Quantum Optics, Garching, Germany, 2007 - 2008
Visiting Scientist at the Ludwig Maximilian University, Munich, Germany, 2007 - 2008
Distinguished Fellow of the Cockcroft Institute, Liverpool, UK, 2007 - present
Consultant, PolyChip, Inc., 1999
Consultant, Intermagnetics General Corporation, 1995
Scientist in Residence, Lexington Christian Academy, 1995 - 1996
Norman F. Ramsey Prize of the American Physical Society, 2024
Member of the US National Academy of Sciences, 2007 -
Member of the American Academy of Arts and Sciences, 2019 -
Trotter Prize, Texas A&M University, 2013
Julius Lilienfeld Prize of the American Physical Society, 2011
Davisson-Germer Prize of the American Physical Society, 2002
Alexander von Humboldt Research Award, Germany, 2005
Premio Caterina Tomassoni and Felice Pietro Chisesi Prize, Italy, 2008
Levenson Prize for Excellence in the Education of Undergraduates, Harvard University, 2000
George Ledlie Prize, Harvard University, 2004
Fellow of the American Physical Society, 1992 - present
Distinguished Alumnus Award, Trinity College, 1999
Distinguished Alumni Award, Calvin College, 2006
Källén Lecturer, Lund, Sweden, 2007
William H. Zachariasen Lecturer at the University of Chicago for 2007 - 2008
Poincaré Lecturer, Paris, 2007
Chaim Weizmann Post Doctoral Fellowship, 1979 - 1982
Instructor of Physics at Trinity Chr. College (part-time), 1976 - 1978
Argonne Graduate Fellowship, 1976 - 1978
Research Assistantship, 1975 - 1976
Danforth Graduate Fellowship, 1973 - 1978
Calvin Research Assistantship, 1972 - 1973
Calvin College Teaching Assistantship, 1971 - 1972
Calvin College Faculty Scholarship, 1971 - 1973
Trinity College Faculty Scholarship, 1970 - 1971
Division of Atomic, Molecular and Optical Physics of the American Physical Society (DAMOP)Vice Chair and Chair of the Fellowship Committee, 2009
Chair Elect, 2010 - 2011
Chair of DAMOP, 2011 - 2012
Chair of the DAMOP Nominations Committee, 2012
Topical Group for Precision MeasurementsExecutive Committee, 1990 - 1993
Study Committee on Precision Time and Time Interval Science and Technology of the National Academy of Sciences, 2001 - 2003
Study Committee on High-Energy-Density Plasma Physics of the National Academy of Sciences, 2001 - 2003
Freedom Car Committee of the National Academy of Sciences, 2010 - 2012
U.S. Drive Committee of the National Academy of Sciences, 2011 - 2012
Study Committee on Overcoming Barriers to Electric Vehicle Deployment of the National Academies, 2012 - 2014
Chair of the Atomic, Molecular and Optical Physics Screening Panel of the National Academy of Sciences, 2013 - 2015
Research Reactor Conversion Committee of the National Academy of Sciences, 2014 - 2015
Board on Physics and Astronomy of the National Academy of Sciences, 2014 - 2016
Committee on the Use of Highly Enriched Uranium in Civilian Research Reactors, 2014
Committee on Reproducibility and Replicability, 2019
Comittee of Visitors, 2015
Board of Trustees, Calvin College, 1995 - 2000
Board of Trustees, Trinity Christian College, 2003 - 2006
Board of Directors (Vice Chair), North Shore Christian School, 1994 - 1995
Board of Advisors, Templeton Foundation, 2005 - 2007, 2009 - 2011, 2014 - 2016
Establishing new paradigms for understanding physical reality requires devising and implementing methods to test their predictions. Gerald Gabrielse probes the predictions, symmetries and extensions to the standard model of particle physics with exquisite sensitivity, with methods that derive their sensitivity from precision rather than energy.
His 1 part in 1013 measurement of the electron magnetic moment, the most precisely measured property of an elementary particle, tests the standard model’s most precise prediction. He and nearly 20 graduate students, one PhD thesis at a time, developed a set of new methods. For the first time, one quantum transition between the lowest cyclotron and spin states of an electron suspended in the magnetic field of a Penning trap were observed and used for measurement. They demonstrated the possibility to achieve the same precision with a positron from a weak radioactive source and now seek to compare the electron and positron moments 200 times more precisely.
Remarkably, his measurement confirms the standard model’s most precise prediction to a part per trillion. Several sectors of the standard model are tested. The Dirac equation predicts most of the moment. Quantum Electrodynamics (QED) predicts a 1 part in 103 correction; tenth order terms (tens of thousands of Feynman diagrams) are calculated to achieve the experimental precision. Calculated couplings to hadrons are significant. Weak interaction calculations are important to establish that they are just smaller than the current measurement precision.
Despite this success, a standard model that cannot explain why a universe made of matter is possible cannot be the whole story. Gabrielse used very different experimental methods to test modifications to the standard model proposed to fix its shortcomings. Where the standard model predicts an electron electric dipole moment is too small to measure, the proposed modifications (e.g. supersymmetric models) typically predict a much larger moment. He (with collaborators DeMille and Doyle) took advantage of the extremely strong electric field within the ThO molecule to twice measure the electron’s electric moment, with both measurements being about 12 times more precise than had previously been possible, testing the standard model at and beyond the TeV scales that the LHC currently probes.
Gabrielse also tested the fundamental CPT symmetry of the standard model by comparing one-particle antiproton and proton cyclotron clocks to compare the charge-to-mass ratios of the antiproton and proton to 9 parts in 1011 to make the most sensitive CPT test with baryons. That these antimatter and matter clocks run at the same rate suggests that the gravitational interaction of these particles is the same to a part in 106 – the most precise direct comparison of antimatter and matter gravity to test the weak equivalence principle. Gabrielse and his team made the first direct one-particle comparison of the antiproton and proton magnetic moments, improving on previous comparisons by a factor of 680.
Finally, Gabrielse started low energy antiproton and antihydrogen physics. He proposed and demonstrated the slowing, trapping and cooling of antiprotons. Antihydrogen formed using his nested Penning trap is magnetically trapped in its ground state as he proposed. Hundreds currently use his methods at the CERN storage ring built to pursue his antiproton and antihydrogen dreams to test standard model symmetries even more precisely.
Since his move to Northwestern, Gabrielse has stepped back from personal involvement in antihydrogen physics and is concentrating upon new research initiatives being carried out at the Center for Fundamental Physics that he directs. He is developing vacuum UV laser systems to cool a hydrogen beam for precise spectroscopy, exploring new cooling possibilities, and pursuing a cavity-based search for dark matter. He is developing new detection methods to mitigate detection back action in pursuit of a 10 times improved measurement of the electron magnetic moment and the mentioned 200 times improved comparison of the electron and positron moments. A third generation of the ACME measurements that aims for a third order-of-magnitude sensitivity increase is now being commissioned in his Northwestern laboratory.
The one-electron quantum cyclotron developed during a 20 year research program resulted in a measurement of the electron's magnetic moment,that is 15 times more precise than the value that had been accepted for 20 years. The new devices and methods employed to realize the one-particle quantum cyclotron include a one-particle self-excited oscillator, inhibition of spontaneous emission, a self-shielding superconducting solenoid, and a cylindrical Penning trap. The positron magnetic moment is to be measured next - to provide the most stringent test of CPT invariance with leptons.
- The new magnetic moment value, with independently measured values of the fine structure constant, tests the quantum electrodynamics sector of the standard model of particle physics at an unusual precision – arguably the most precise comparison of a measurement and a calculation.
- The new magnetic moment value, when standard model theory is presumed to be correct, determines the fine structure constant,
more than an order of magnitude more accurately than any other method or measurement.
The electron's other electric dipole moment – its electric dipole moment – is predicted to be measureable by most proposed extensions to the standard model of particle physics, while the standard model itself predicts that it is unmeasurably small. This makes it a great place to look for a possible breakdown of the standard model.
Gabrielse and his group, in collaboration with the Doyle and DeMille groups, used ThO molecules to show the electron's electric dipole moment is 12 times smaller than had previously been demonstrated. Their limit,
d < 8.7 x 10-29 e cm, is the smallest limit ever set on the electric dipole moment of a particle. It probes the standard model at the 1 to 3 TeV scale or higher, at or higher than probes being carried out at CERN's Large Hadron Collider.This work stimulated many particle physics papers aimed at understanding and reconciling this greatly improved limit with predictions of extensions proposed to the standard model.
The antiproton magnetic moment (scaling naturally as a nuclear magneton rather than a Bohr magneton) is much more difficult to detect than is that of an electron. A research program underway seeks to improve the precision with which the antiproton and proton can be compared by a factor of a million or more, to make a stringent test of CPT invariance with baryons. After realizing the first one-proton self-excited oscillator and using it to measure the proton magnetic moment at the level of a few ppm, the apparatus has been installed at the Antiproton Deccelerator at CERN. This year it was used to make a measurement that is 680 more precise than previous measurements. The next goal is to use quantum jump spectroscopy and a two-trap method to reach ppb precision.
Prof. Gabrielse initiated low energy antiproton physics when he, and the small TRAP team that he led, first slowed antiprotons in matter, captured them in a trap, cooled them via electron-cooling in a trap, and accumulated them for low energy measurements. Their comparison of the charge-to-mass ratios of the antiproton and proton,, 9 parts in 1011has stood for many years as the most stringent test of CPT invariance with baryons.
Gabrielse initiated cold antihydrogen physics, by providing the methods used to make cold antiprotons available for experiments (above) and by outlining how cold antihydrogen atoms could be produced from trapped antiprotons. The nested Penning trap that Gabrielse and his students demonstrated is a device and method that he and collaborators invented to make opposite sign particles interact long enough for atom formation. Gabrielse and his ATRAP team were one of two teams that first observed the antihydrogen atoms made using this device and method. ATRAP's field ionization detection technique allowed a background-free observation and the only measurement method so for that determines the states of antihydrogen that are being produced. Their method to drive the production of antihydrogen substantially increased the production rate. ATRAP later demonstrated a second method to produce slow antihydrogen, for the first time using lasers to control the production via a charge exchange method.
Shortly after first trapping antiprotons, Gabrielse proposed that the cold antihydrogen atoms be confined in a magnetic trap for precise laser spectroscopy – to compare antihydrogen and hydrogen atoms. This vision and approach is now being pursued by four international collaborations, working at a storage ring that CERN built to allow the pursuit of this vision, and using the his cold antiproton methods. His ATRAP team observed the first production of antihydrogen atoms within the fields of an Ioffe trap. The ALPHA team reports that an antihydrogen atom is so trapped in one of ten trials. ASACUSA is pursuing the production of antihydrogen atoms in a CUSP trap. AEGIS proposes to do antihydrogen gravity experiments, using his cold antiproton methods and the dilution refrigerator methods to produce cold positrons that he and his students demonstrated with electrons. ATRAP's recent focus has been to produce colder antiproton plasmas at much lower temperatures as a step to producing usable numbers of antihdyrogen atoms that are cold enough to be trapped.
Prof. Gabrielse and his collaborators seek to measure the electron's electric dipole moment using cold ThO molecules. The experiment is under development.
July 22 - ICAP Workshop on Atomic Physics Tests of General Physical Principles (invited talk)
July 27 - Organized and Moderated ICAP Workshop on Ion Trapping
Sept 1 - University of British Columbia (physics colloquium)
Oct 5 - Los Alamos National Laboratory (AT colloquium)
Nov 7 - University of Pittsburgh (physics colloquium and particle physics seminar)
Dec 20 - University of Texas at Austin (atomic physics seminar)
Jan 25 - LEAR Users Meeting, Savoie, France
Jan 30 - University of Mainz (atomic physics seminar)
Feb 19 - North Carolina State University (atomic physics seminar)
Feb 20 - University of Chicago (particle physics seminar)
Feb 23 - Purdue University (physics colloquium and electrical engineering colloquium)
Feb 26 - Massachusetts Institute of Technology (atomic physics colloquium)
Feb 28 - Hope College (physics colloquium)
Apr 15 - Open Session of Proton Synchrotron Committee, CERN
Apr 17 - ISOLDE Colloquium, CERN
Apr 20 - Workshop on Polarized Antiproton Sources Bodega Bay, California (invited talk)
Apr 22 - University of Arizona (physics colloquium)
Apr 25 - North Carolina State University (physics colloquium)
July 1 - Gordon Conference on Atomic Physics (invited talk)
Oct 9 - University of California at Berkeley (physics colloquium)
Oct 23 - State University of New York at Stony Brook (physics colloquium)
Oct 24 - IBM (Yorktown, New York)
Oct 25 - Columbia University (physics colloquium)
Dec 9 - Harvard University (physics colloquium)
Dec 11 - Fermi National Accelerator Laboratory (physics colloquium)
Jan 28 - University of Guelph (physics colloquium)
Jan 29 - University of Western Ontario (physics colloquium)
Mar 3 - TRIUMF (physics colloquium)
Mar 13 - Science Fair Speaker for Watson Groen Christian Grade School
Mar 27 - Institute for Seattle Area Physics and Math Teachers
June 9 - International Conference on Quantum Electronics XIV San Francisco (invited lecture)
Sept 25 - International School of Physics with Low Energy Antiprotons: Fundamental Symmetries (invited tutorial lecture)
Oct 24 - SPS Invited Lecture, Optical Society of America Meeting, Seattle, WA
Oct 24 - OSA session on Laser Instabilities and Interjection Locking (presider)
Nov 13 - University of Nebraska (physics colloquium)
Jan 8 - Cluster Ion Conference, San Francisco (invited lecture)
Jan 20 - Brandeis University (physics colloquium)
Jan 22 - Brookhaven National Laboratory (physics colloquium)
Jan 23 - Columbia University (physics colloquim)
Mar 19 - Argonne National Laboratory (particle physics colloquium)
Apr 20 - American Physical Society Meeting, Crystal City, VA (invited lecture)
May 5 - Northwestern University (physics colloquium)
May 7 - University of Missouri-Rolla, Distinguished Visiting Professor Program, (invited lecture)
May 20 - American Physical Society Meeting, Boston, MA (invited lecture)
June 15 - AFI Workshop and Symposium on Low Energy Particles, Stockholm, Sweden (invited lecture)
June 22 - Laser Spectroscopy Conference, Are, Sweden, (invited lecture)
July 22 - International Conference on the Physics of Electrons and Collisions (ICPEAC) Brighton, England (invited lecture)
Oct 1 - Syracuse University (physics colloquium)
Nov 2 - Harvard University (physics colloquium)
Nov 13 - Yale University (physics colloquium)
Dec 1 - International Conference on Low Energy Antimatter Karlsruhe, Germany (invited lecture)
Feb 2 - Calvin College (physics colloquium)
Feb 3 - Notre Dame (physics colloquium)
Feb 4 - University of Chicago (physics colloquium)
Feb 25 - Amherst College (physics colloquium)
Feb 26 - University of Connecticut (physics colloquium)
Apr 7 - Pennsylvania State University (physics colloquium)
May 16 - Third Conference on the Interaction Between Particle and Nuclear Physics, Rockport, Maine (invited plenary lecture)
July 1 - Symposium on the Hydrogen Atom at the Scuola, Normale Superiore, Pisa, Italy (invited lecture)
Sept 6 - IX European Symposium on Antiproton-Proton Interactions and Fundamental Symmetries, Mainz, West Germany (invited lecture)
Jan 10 - College de France and Ecole Normale Superieure, Paris, France (invited lecture)
Feb 15 - University of Aarhus, Aarhus, Denmark (physics colloquium)
Feb 23 - California Institute of Technology (physics colloquium)
Feb 28 - University of California at San Diego (physics colloquium)
Mar 2-4 - First Annual Symposium on Frontiers of Science sponsored by the National Academy of Sciences (invited participant)
May 1 - American Physical Society, Baltimore, Maryland (invited speaker)
June 9 - University of Karlsruhe, Karlsruhe, West Germany (physics colloquium)
June 12 - Hahn-Meitner Institute, West Berlin, West Germany (physics colloquium)
July 10 - Combined Colloquium of the Technical University of Munich, the Maximillian University and the Max Planck Institute for Quantum Optics, Munich, West Germany
Aug 23 - Institute de Lau Langevin, Grenoble, France (physics colloquium)
Sept 12 - IBM Research Laboratory, Yorktown, New York (physics colloquium)
Sept 22 - University of Wisconsin at Madison (physics colloquium)
Sept 28 - Princeton University (physics colloquium)
Oct 2 - Harvard University (physics colloquium)
Oct 20 - University of Virginia, Charlottesville (physics colloquium)
Nov 6 - 27th Annual New Horizons of Science Briefing of the Council for the Advancement of Science Writing at Cornell University (invited lecture)
Jan 12 - Argonne National Laboratory, Chicago, Illinois (physics colloquium)
Jan 24 - University of Pennsylvania (physics colloquium)
Apr 16 - Washington D.C. Meeting of the American Physical Society (invited lecture)
Apr 30 - Rutherford Laboratory, Oxford, England (physics colloquium)
May 1 - High Energy Physics Seminar, Oxford University, Oxford, England
May 23 - Meeting of the Division of Electron, Atomic, Molecular and Optical Physics, Monterey, California (invited lecture)
July 4 - Low Energy Antiproton Physics Conference, Stockholm, Sweden (invited lecture)
Aug 3 - International Conference of Atomic Physics, Ann Arbor, Michigan (invited lecture)
Aug 15 - Gordon Conference on Few Body Physics, New Hampshire (invited lecture)
Sept 25 - MIT (atomic physics colloquium)
Sept 26 - Boston University (physics colloquium)
Sept 27 - Los Alamos National Laboratory (physics colloquium)
Oct 18 - University of Chicago (physics colloquium)
Oct 24 - Division of Nuclear Physics Fall Meeting, University of Illinois at Urbana Champaign (invited lecture)
Nov 6 - Optical Society of America, Boston, Massachusetts (invited lecture)
Nov 10 - Society of Physics Students Zone Meeting, Rolla, Missouri (keynote speaker)
Dec 6 - New York University (physics colloquium)
Jan 18 - New York Academy of Science (featured speaker)
Jan 23 - Rice University (physics colloquium)
Feb 13 - University of Massachusetts, at Amherst (physics colloquium)
Feb 25 - Cornell University (physics colloquium)
Mar 21 - Princeton University (plasma physics colloquium)
Apr 1 - Brown University (physics colloquium)
May 3 - Yale University (physics colloquium)
July 4 - Gordon Conference on Atomic Physics, New Hampshire (invited lecture)
July 12 - Italian Physical Society Summer School, International School of Physics, Varenna, Italy (invited lecture)
Aug 26 - 9th International Conference on Positron Annihilation, Szombathely, Hungary (invited lecture)
Oct 11 - Fermi National Accelerator Laboratory (physics colloquium)
Oct 23 - University of Rochester (physics colloquium)
Oct 28 - Haverford College (physics colloquium)
Nov 7 - Massachusetts Institute of Technology (physics colloquium)
Feb 25 - York University (Toronto), (physics colloquium)
July 30 - Antihydrogen Workshop (Munich, Germany) (invited lecture)
Aug 4 - 13th International Conference on Atomic Physics (Munich, Germany) (invited lecture)
Aug 10 - CERN Summer Lecture Program, Geneva, Switzerland (invited lecture)
Sept 19 - Second Biennial Conference on Low-Energy Antiproton Physics - LEAP '92 (Courmayeur, Italy) (invited lecture)
Oct 26 - Coast Guard Academy, New London, CT (science colloquium)
Nov 3 - National Science Foundation and George Washington University (joint physics colloquium)
Nov 24 - University of Tennessee, Knoxville (physics colloquium)
Feb 11 - American Association for the Advancement of Science, Public Science Day, Cambridge Rindge and Latin School (invited lectures)
Feb 12 - American Association for the Advancement of Science, Boston (invited lecture)
Feb 17 - University of Delaware (physics colloquium)
Feb 25 - Workshop on Traps for Antimatter and Radioactive Nuclei (TRIUMF), University of British Columbia, Vancouver (invited lecture)
Mar 12 - McGill University Montreal, (invited lecture)
Mar 12 - McGill University, Montreal (physics colloquium)
Mar 25 - Society of Physics Students, Worcester Polytechnic Institute (invited lecture)
Apr 13 - Washington D.C. Meeting of the American Physical Society (undergraduate address)
Apr 14 - Washington D.C. Meeting of the American Physical Society (invited lecture)
Apr 20 - Brookhaven National Laboratory (physics colloquium)
May 4 - Quantum Electronics Laser Science Conference, Baltimore (invited lecture)
May 17 - Meeting of the Division of Atomic, Molecular, and Optical Physics of the American Physical Society (Reno, NV) (invited lecture)
June 3 - California Institute of Technology (physics colloquium)
June 15 - GSI (Darmstadt, Germany) (physics colloquium)
June 22 - University of Bern, Switzerland (physics colloquium)
June 23 - University of Geneva, Switzerland (physics colloquium)
July 5 - Gordon Conference (New Hampshire) (invited lecture)
July 16 - Positron Satellite Meeting to ICPEAC, Bielefeld, Germany (invited lecture)
Sept 15 - 2nd Workshop on Nucleon-Antinucleon Physics (NAN '93), Institute of Theoretical Physics, Moscow
Oct 27 - McMaster University, Hamilton, Ontario, Canada (physics colloquium)
Oct 28 - University of Toronto, Toronto, Canada (physics colloquium)
Nov 8 - Harvard University (physics colloquium)
Nov 17 - Manne Siegbahn Memorial Lecture, Stockholm, Sweden (invited ecture)
Jan 6 - American Association of Physics Teachers, San Diego (plenary lecture)
Jan 31 - North Carolina State University, Raleigh (Derieux Science Lecture)
Mar 11 - Harvard University (joint seminar for the History and Philosophy of 20th Century Science)
July 20 - Nonneutral Plasma Workshop, University of California, Berkeley (invited lecture)
Aug 24 - Nobel Symposium 91 on Trapped Charged Particles and Fundamental Physics, Lysekil, Sweden (invited lecture)
Sept 17 - 3rd Biennial Conference on Low-Energy Antiproton Physics (LEAP '94) Bled, Slovenia (invited lecture)
Nov 7 - University of Washington, Seattle (physics colloquium)
Sept 25 - Harvard University (physics colloquium)
Sept 27 - Fermilab (physics colloquium)
Nov 16 - Wayne State University (physics colloquium)
Nov 27 - Stanford Linear Accelerator Center (SLAC) (physics colloquium)
Nov 30 - Korea University, Seoul, Korea (physics colloquium)
Dec 1 - Pohang University, Pohang, Korea (physics colloquium)
Dec 4 - Seoul National University, Seoul, Korea (physics colloquium)
Feb 26 - VanderWaals-Zeeman Institute, University of Amsterdam (physics colloquium)
Feb 27 - DESY, Hamburg, Germany (physics colloquium)
Mar 14 - Florida State University (physics colloquium)
Mar 16 - Address to Harvard Graduate Alumni
Mar 19 - State University of New York, Stony Brook (physics colloquium)
Apr 25 - Phillips Laboratory, Kirtland AFB, NM, Contractor's Workshop (invited lecture)
May 24 - Argonne National Laboratory (physics colloquium)
June 1 - Workshop on K Physics, Orsay, France (invited lecture)
June 3 - CE Saclay, Gif-sur-Yvette, France (physics colloquium)
June 4 - LPNHE, Ecole Polytechnique, Palaiseau, France (physics colloquium)
July 13 - ITAMP Workshop on Exotic Atoms, Harvard University (invited lecture)
Aug 9 - 15th International Conference on Atomic Physics - Zeeman Effect Centenary, (Amsterdam, The Netherlands) (invited lecture)
Aug 29 - 4th Biennial Conference on Low-Energy Antiproton Physics (LEAP '96), (Dinkelsbuhl, Germany) (invited lecture)
Jan 10 - University of Kentucky, (physics colloquium)
Jan 23 - University of Chicago, (physics colloquium)
Jan 31 - University of Connecticut (physics colloquium)
Feb 5 - Northwestern University, Evanston (physics colloquium)
Feb 12 - Harvard University Science Lecture Series (invited lecture)
Feb 27 - University of Missouri, Rolla (physics colloquium)
Mar 21 - Cornell University (HEP seminar)
Apr 18 - Washington D.C. Joint Meeting of the American Physical Society and American Association of Physics Teachers (invited lecture)
Apr 30 - Indiana University (physics colloquium)
May 15 - CERN, LEAR Symposium (invited lecture)
June 10 - University of Sofia, Bulgaria (physics colloquium)
June 12 - Workshop on Frontier Tests of Quantum Electrodynamics and Physics of the Vacuum, Sandansky, Bulgaria (invited lecture)
June 29 - FOM - Institute for Atomic and Molecular Physics (AMOLF), Amsterdam (physics colloquium)
Jul 27-31 - XXXI Latin American School of Physics, El Colegio Nacional, ELAF 98 on New Perspectives in Quantum Mechanics, Mexico City, Mexico (5 invited one-hour lectures)
Aug 7 - 16th International Conference on Atomic Physics (ICAP 16), Windsor, Ontario, Canada (Hot Topics Session (invited lecture)
Aug 31 - Trapped Charged Particles and Fundamental Physics, Monterey, CA (invited lecture)
Oct 19 - Cornell University (physics colloquium)
Nov 7 - CPT and Lorentz Symmetry Conference, Indiana University (invited lecture)
Jan 13 - Institute for Medium Energy Physics of the Austrian Academy of Sciences, Vienna (physics colloquium)
Jan 27 - Queen's University, Kingston, Ontario, Canada (physics colloquium)
Jan 28 - Queen's University, Kingston, Ontario, Canada (Geneva Lecture)
Mar 19 - 2nd North American FTICR Conference, San Diego, CA (invited lecture)
Mar 24 - American Physical Society Centennial Meeting, Atlanta (invited lecture)
Apr 6 - Michigan State University (physics colloquium)
May 24 - Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference (invited lecture)
June 10 - Lepton Moments, Internationales Wissenschaftsforum in Heidelberg (invited lecture)
June 11 - University of Heidelberg (physics colloquium)
July 26 - Quantum Optics Conference, Jackson Hole (invited lecture)
Aug 2 - Plasma Physics Conference, Princeton University (invited lecture)
Sept 13 - 4th International Conference on Physics at Storage Rings (STORI'99), Bloomington, IN (invited lecture)
Sept 20 - Carnegie Mellon University - University of Pittsburgh (joint physics colloquium)
Sept 29 - Trinity Christian College, Palos Heights, IL (Alumnus of the Year Lecture)
Nov 4 - Workshop on Fragmentation and Recombination in Novel 3- and 4-body Systems, ITAMP at Harvard University (invited lecture)
Jan 14 - Argonne National Laboratory (physics colloquium)
Feb 8 - Boston University (physics colloquium)
Feb 11 - Tufts University (physics colloquium)
Feb 17 - Calvin College (physics colloquium)
Feb 28 - Harvard University (physics colloquium)
Mar 23 - American Physical Society March Meeting 2000, Minneapolis, MN (invited lecture)
Apr 29 - American Physical Society April Meeting 2000, Long Beach, CA (invited lecture)
June 5 - 17th International Conference on Atomic Physics (ICAP 2000), Florence, Italy (invited lecture)
July 5 - International Conference on Quantum Communication, Measurement and Computing (QCM&C Y2K), Capri, Italy (invited lecture)
July 21 - ITAMP Workshop on Quantum Electrodynamics, Harvard University (invited lecture)
Aug 9 - 12th International Conference on Positron Annihilation (ICPA-12), Munich (invited lecture)
Aug 24 - Biennial Conference on Low Energy Antiproton Physics (LEAP 2000), Venice, Italy (invited lecture)
Sept 13 - Fall Teaching Orientation, Derek Bok Center for Teaching and Learning, Harvard University (invited lecture)
Sept 22 - 2nd Euroconference of Atomic Physics at Accelerators: Mass Spectroscopy (APAC 2000), Cargese, Corsica (France) (invited lecture)
Oct 30 - 38th Annual Briefing - New Horizons in Science, Council for the Advancement of Science Writing, Inc. (CASW), Houston, TX (invited lecture)
Dec 6 - Fermilab (physics colloquium)
Dec 15 - Yale University (physics colloquium)
Jan 10 - Schroedinger Lectures, Austrian Academy of Sciences, Vienna (city wide popular science lecture)
Jan 10 - "Junior Academy", addressing high school students, Vienna
Jan 11 - University of Vienna (physics colloquium)
Jan 15 - Structure of Hadrons, International Workshop XXIX on Gross Properties of Nuclei and Nuclear Excitations (Hirschegg '01), Hirschegg, Kleinwalsertal, Austria (invited lecture)
Mar 30 - Columbia University (plasma physics colloquium)
Apr 12 - University of Chicago (physics colloquium)
June 5 - Harvard University Graduate School Alumni Association Council (faculty presentation)
June 14 - International Conference on CP Violation (KAON 2001), Pisa, Italy (invited lecture)
July 18 - A Summer Study on the Future of Particle Physics (Snowmass 2001), Snowmass, CO (invited lecture)
July 30 - 2001 Workshop on Non-Neutral Plasmas, University of California, San Diego (invited lecture)
Aug 18 - 2nd Meeting on CPT and Lorentz Symmetry, Indiana University, Bloomington (invited lecture)
Aug 24 - Alpbach Technology Forum, Alpbach, Austria (invited lecture)
Nov 27 - Center for Ultra-Cold Atoms, MIT (physics colloquium)
Feb 16 - American Assocation for the Advancement of Science, Boston (invited lecture)
Apr 11 - Cold Antimatter Workshop, Inst. for Theoretical Atomic and Molecular Physics (ITAMP), Harvard University (invited lecture)
Apr 23 - American Physical Society April Meeting, Albuquerque, NM (invited lecture)
May 17 - Faculty Workshop on the use of Technology in Teaching and Learning, Harvard University (invited lecture)
May 31 - Davisson-Germer Prize Symposium, American Physical Society, College of William and Mary, Williamsburg, VA (prize recipient lecture)
May 31 - Division of Atomic, Molecular and Optical Physics Annual Meeting (DAMOP), American Physical Society, Williamsburg, VA (invited lecture)
June 12 - Cooling 2002, Visby, Island of Gotland, Sweden (invited lecture)
June 17-21 - Four lectures on "Low energy experiments that measure fundamental constants and test basic symmetries", CERN, Geneva (invited Academic Training Lectures)
June 20 - XIVth Rencontres, Matter-Antimatter Asymmetry Conference, Blois, France (invited lecture)
July 1 - Truth in Science, Truth in Religion Conference, Harvard University (invited lecture)
July 26 - Resonances and Reflections: Profiles of Ugo Fano's Physics and Its Influences Workshop, Institute for Theoretical Atomic and Molecular Physics (ITAMP), Harvard-Smithsonian Center for Astrophysics (invited lecture)
Aug 1 - International Conference on Atomic Physics (ICAP 02), MIT and Harvard (invited lecture)
Oct 19 - Hans Dehmelt Symposium, University of Washington, Seattle (invited lecture)
Oct 28 - Harvard University (physics colloquium)
Dec 5 - Ouachita Baptist University, Arkadelphia, AR (invited lecture)
Mar 5 - University of Texas at Austin, (physics colloquium)
Mar 11 - CERN Particle Physics Seminar (invited lecture)
Mar 12 - l Ecole Normale Superieure, Laboratoire Kastler Brossel, (physics colloquium)
Mar 26 - University of Massachusetts, Lowell (physics colloquium)
Apr 1 - Massachusetts Institute of Technology, Center for Ultracold Atoms (physics colloquium)
Apr 5 - Meeting of the American Physical Society (APS 03), Philadelphia, PA (invited lecture)
May 15 - International Workshop on the Future of AD Physics Program, Max-Planck-Institut for Quantenoptik, Garching, Germany (invited lecture)
May 19 - International Workshop on Beam Cooling and Related Topics (COOL 03), Mt Fuji, Japan (invited lecture)
May 23 - Division of Atomic, Molecular and Optical Physics (DAMOP) of the American Physical Society, Boulder, CO (invited lecture)
June 8 - 17th International Conference on Few-Body Problems in Physics (FB17), Duke University/TUNL, Durham, NC (plenary lecture)
June 9 - Lepton Moments International Symposium, Yarmouthport, Cape Cod, MA (invited lecture)
June 12 - Fourth International Conference on Physics Beyond the Standard Model (Beyond the Desert 2003), Tegernsee, Germany (invited lecture)
July 9 - Workshop on Non-Neutral Plasmas - 2003, Santa Fe, NM (invited lecture)
July 14 - 16th International Conference on Laser Spectroscopy (ICOLS03), Palm Cove, N. Queensland, Australia (invited lecture)
July 19 - 12th International Workshop on Low Energy Positron and Positronium Physics (POSITRON 2003), Sonderborg, Denmark (invited lecture)
July 28 - XXIII International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC), Stockholm, Sweden (invited lecture)
July 31 - Mini-Symposium on Cold Antihydrogen, Uppsala University, Sweden (invited lecture)
Sept 18 - Meeting of the Users Group for Low-Energy Antiproton Physics at GSI, GSI, Darmstadt (invited speaker)
Oct 6 - University of Arizona, Tucson (physics colloquium)
Oct 7 - 2003 Frontiers in Optics, 87th Optical Society of America Annual Meeting, Tucson, AZ (plenary lecture)
Oct 8 - Washington University, St. Louis (physics colloquium)
Oct 16 - 2nd International Workshop on the Future Accelerator Facility for Beams of Ions and Antiprotons: Challenges and Opportunities, GSI, Darmstadt (invited speaker)
Nov 7 - 12th Regional Conference of Undergraduate Research of the Murdock College Science Research Program, Pacific Lutheran University, Tacoma, WA (keynote address)
Nov 10 - University of California, Berkeley (physics colloquium)
Nov 13 - 8th International Workshop on Atom Optics and Interferometry, Lunteren, The Netherlands (invited lecture)
Dec 1 - Cornell University (physics colloquium)
Dec 2 - Syracuse University (physics colloquium)
Dec 3 - University of Rochester, (physics colloquium)
Dec 4 - Northeastern University (physics colloquium)
Jan 13 - Atomic and Molecular Interactions Group (AMIG) of the Institute of Physics, Dublin City University (invited speaker)
Feb 3 - CERN SPSC (antihydrogen progress lecture)
Feb 11 - University of Michigan (physics colloquium)
Feb 12 - University of Michigan (atomic, molecular and optical physics seminar)
Feb 12 - University of Michigan (science and religion lecture)
Mar 2 - University of Uppsala, Sweden (Lecture on attracting students to science and teaching science so they love it)
Mar 3 - University of Uppsala, Sweden (physics seminar)
Mar 4 - Umeå University, Sweden (physics colloquium)
Mar 4 - Umeå University, Sweden (atomic physics seminar)
Mar 9 - Göteborg University, Sweden (physics colloquium)
Mar 9 - Göteborg University, Sweden (Lecture on attracting students to science and teaching science so they love it)
Mar 10 - Manne Sigbahn Laboratory, Stockholm (physics colloquium)
Mar 11 - University of Stockholm, Sweden (Alba Nova colloquium)
Mar 12 - Uppsala University, Sweden (physics colloquium)
Apr 19 - 14th American Physical Society Topical Conference on Atomic Processes in Plasmas (APiP), Santa Fe, NM (the plenary lecture)
Apr 22 - Pluecker Lecture I, University of Bonn (physics colloquium)
Apr 23 - Pluecker Lecture II, University of Bonn (special audience lecture)
May 7 - KVA Seminar, Groningen, The Netherlands
May 10 - Free University of Amsterdam (physics colloquium)
May 13 - Eindhoven University (physics colloquium)
May 14 - Nijmegen Univeristy (physics colloquium)
May 15 - US National Academy of Sciences CAMOS (invited lecture)
May 17 - Aachen University (physics colloquium)
May 18 - Johannes Gutenberg University and Max Planck Institute for Polymer Research, Mainz, Germany (physics colloquium)
May 24 - University of Nottingham, UK (physics colloquium)
May 26 - University of Sussex, UK (physics colloquium)
May 28 - University of Liverpool, UK (particle physics seminar)
July 27 - XIX International Conference on Atomic Physics, Rio de Janeiro (invited speaker)
Aug 25 - Laser Spectroscopy Conference, Novosibirsk, Russia (invited speaker)
Sept 24 - SPSC Meeting on a Future Fixed Target Programme at CERN, Villars, Switzerland (invited speaker)
Oct 14 - Calvin College (physics colloquium)
Nov 16 - Guelph-Waterloo Physics Institute, Guelph, Ontario (distinguished scientist lecture)
Dec 2 - California Institute of Technology (physics colloquium)
Dec 3 - California State University, Long Beach (physics colloquium)
Dec 9 - Wesleyan University (physics colloquium)
Dec 14 - MIT/Harvard Center for Ultracold Atoms seminar
Dec 16 - Brookhaven National Laboratory (particle physics seminar)
Jan 21 - Ohio University (physics colloquium)
Jan 27 - Hanan Rosenthal Memorial Lecture, Yale University
Jan 28 - Yale University (physics colloquium)
Feb 4 - University of Connecticut (physics collquium)
Feb 14 - Harvard University (physics colloquium)
Feb 24 - International Conference on Exotic Atoms (EXA 2005), Vienna, Austria (invited lecture)
Mar 7 - Annual Meeting of the German Physical Society, Berlin, Germany (invited lecture)
Mar 18 - University of Virginia (physics colloquium)
Mar 24 - Annual Meeting of the Physical Society of Japan, Noda, Japan (special invited lecture)
Mar 30 - University of Wisconsin, Madison (physics colloquium)
Apr 22 - Dunbar High School, Baltimore, MD (lectures to science classes)
May 10 - Stanford University (physics colloquium)
May 20 - Year of Einstein Lecture, Bonn, Germany (popular lecture on science associated with LEAP 2005)
July 28 - International Workshop on Low Energy Positron and Positronium Physics, Campinas, Brazil (plenary lecture)
Aug 6 - Conference of the European Group for Atomic Systems (EGAS 37), Dublin City University, Ireland (plenary lecture)
Sept 28 - Cold and Ultracold Plasma and Rydberg Physics Workshop, Institute for Theoretical Atomic, Molecular and Optical Physics, CFA, Harvard (invited lecture)
Oct 8 - Charles H. Townes Celebration, University of California, Berkeley (invited panel speaker)
Oct 13 - Dordt College, Sioux City, IA (science colloquium)
Oct 13 - Dordt College, Sioux City, IA (public science and religion lecture)
Oct 28 - 50th Anniversary of the Discovery of the Antiproton Symposium, Lawrence Berkeley National Laboratory (invited lecture)
Nov 15 - Aachen University of Technology, Germany (physics colloquium)
Dec 13 - GSI, Darmstadt, Germany (physics colloquium)
Jan 24 - CERN SPSC, Geneva, Switzerland
Jan 27 - Brookhaven National Laboratory (magnet group seminar)
Feb 9 - University of Illinois (physics colloquium)
Feb 21 - University of Grunberg, European Graduate School Lecture Week, Germany (antihydrogen lecture)
Feb 22 - University of Grunberg, European Graduate School Lecture Week, Germany (electron magnetic moment lecture)
Feb 23 - University of Grunberg, European Graduate School Lecture Week, Germany (helium spectroscopy lecture)
Mar 1 - University of Cambridge, UK (physics colloquium)
Mar 2 - University of Cambridge, UK (Faraday Lecture in Science and Religion)
Apr 7 - Cultivating Inquiry Workshop, Lexington, MA (keynote address to 150 high school teachers)
Apr 20 - Dunbar High School, Baltimore, MD (lectures to science classes)
May 16 - Division of Atomic, Molecular and Optical Physics (DAMOP), Knoxville, TN (invited lecture for graduate student symposium)
May 19 - Calvin College (distinguished alumnus talks to faculty, boards and at commencement)
June 2 - CIPANP Conference on the Intersections of Particle and Nuclear Physics (invited lecture), Puerto Rico (invited lecture)
June 19 - Lepton Moments 2006, Cape Cod, MA (invited speaker)
July 20 - International Conference on Atomic Physics (ICAP 2006), Innsbruck, Austria (invited speaker)
July 25 - International Conference on Atomic Collisions in Solids (ICACS 2006), Berlin (special invited lecture
Sept 5 - Trapped Charged Particles and Fundamental Physics Conference, Vancouver, Canada (invited lecture)
Sept 15 - National Institute of Standards and Technology, Gaithersburg (physics colloquium)
Sept 18 - Harvard University (physics colloquium)
Sept 19 - Center for Ultracold Atoms, MIT (seminar)
Oct 10 - Flavour in the Era of the LHC, CERN, Geneva (invited lecture)
Oct 27 - Conference on Applications of Gamma Ray Diffraction, Grenoble, France (invited lecture)
Oct 31 - American Physical Society, Division of Plasma Physics, Philadelphia (invited tutorial)
Nov 13 - University of Washington, Seattle (physics colloquium)
Nov 15 - Rutgers University (physics colloquium)
Nov 16 - Princeton University (physics colloquium)
Dec 7 - The University of Oklahoma, Norman (physics colloquium)
Dec 8 - Argonne National Laboratory (physics colloquium)
Jan 6 - Physics of Quantum Electronics (PQE), Snowbird, Utah (invited lecture)
Jan 16 - York University, Toronto (physics colloquium)
Jan 18 - University of California, San Diego (physics colloquium)
Jan 23 - Ohio State University (physics colloquium)
Jan 24 - Fermilab (physics colloquium)
Jan 25 - Michigan State University (physics colloquium)
Jan 30 - University of Maryland (physics colloquium)
Feb 2 - University of New Mexico (physics colloquium)
Feb 6 - CERN SPSC, Geneva
Feb 15 - MIT (physics colloquium)
Feb 20 - Massachusetts General Hospital (physics colloquium)
Feb 21 - Veritas Forum at Harvard University (introduction and moderator)
Feb 27 - Boston University (physics colloquium)
Feb 28 - Assumption College, Worcester, MA (science and religion lecture)
Mar 7 - University of Liverpool (Frohlich lecture)
Mar 8 - Imperial College, London (physics colloquium)
Mar 27 - Science and Secondary Education Lecture, Lexington
Mar 28 - Rice University, Houston (physics colloquium)
Apr 2 - Grant Writing for Science and English Students, Boston
Apr 4 - Sixth North American FT-ICR MS Conference, Lake Tahoe (plenary lecture)
Apr 5 - University of California, Los Angeles (physics colloquium)
Apr 9 - Columbia University (physics colloquium)
Apr 14 - American Physical Society Annual Meeting, Jacksonville, FL (plenary lecture)
Apr 25 - University of Notre Dame (physics colloquium)
Apr 28 - Lexington Christian Academy, Lexington, MA (Lecture on science and secondary education)
May 7 - Dunbar High School, Baltimore (scientist speaks on science)
May 10 - Drexel University, Philadelphia (physics colloquium)
May 29 - Källén Symposium on Nature's Laws and Nature's Constants, Lund, Sweden, (plenary lecture on testing QED)
May 29 - Källén Symposium on Nature's Laws and Nature's Constants, Lund, Sweden, (plenary lecture on antimatter tests of fundamental symmetry)
May 30 - Göteborg University, Sweden (physics colloquium)
May 31 - Uppsala University, Sweden (physics colloquium)
June 1 - Uppsala University, Sweden (antihydrogen lecture)
June 7 - Foundations of Modern Physics (IQOQI), Vienna (invited lecture)
June 9 - American Physical Society, Division of Atomic, Molecular and Optical Physics (DAMOP), Calgary, Canada (invited hot-topics lecture)
June 21 - International Quantum Electronics Conference, (IQEC 2007), Munich (invited lecture)
June 25 - International Conference on Laser Spectroscopy, (ICOLS 07), Telluride, CO (invited lecture)
July 2 - Gordon Conference on Atomic Physics, Tilton, NH (invited lecture)
Aug 23 - Alpbach Technology Forum, Alpbach, Austria (invited lecture)
Sept 12 - Quantum Atomic, Molecular and Plasmas Physics Conference (QuAMP 2007), London (keynote speaker)
Sept 28 - Laboratory of Particle Physics (LAPP), Annecy, France (physics colloquium)
Oct 5 - International School on Quantum Metrology and Fundamental Constants, Les Hourches, France (invited lecture)
Oct 16 - American Institute of Physics Industrial Physics Forum, Seattle (invited lecture)
Nov 7 - ETH Zurich (physics colloquium)
Nov 9 - Free University, Berlin (physics colloquium)
Nov 14 - University of Michigan (Crane Centennial Colloquium)
Nov 15 - University of Chicago (Zachariasen lecture)
Nov 16 - U.S. Department of Energy (invited lecture)
Nov 26 - University of Ulm, Germany (physics colloquium)
Nov 27 - University of Ulm, Germany (antihydrogen seminar)
Dec 5 - Extra-Low-Energy Antiproton Ring (ELENA) meeting, CERN, Geneva (invited lecture)
Dec 8 - Poincaré Lectures on Spin, Paris (Poincaré lecture)
Jan 18 - University of Heidelberg (physics colloquium)
Feb 8 - Umeå University, Sweden (physics colloquium)
Feb 8 - Umeå University, Sweden (antihydrogen lecture)
Feb 12 - Swedish Institute for Space Physics, Kiruna (physics colloquium)
Feb 14 - University of Stockholm, Alba Nova (physics colloquium)
Feb 14 - University of Stockholm, Alba Nova (antihydrogen seminar)
Feb 29 - University of Erlangen, Germany (special physics colloquium)
Mar 4 - Max Planck Institute of Quantum Optics, Garching (physics colloquium)
Mar 6 - Max Planck Institute of Quantum Optics, (antihydrogen ecture)
Mar 10 - University of Florence, Italy (physics colloquium)
Mar 12 - LENS, Florence, Italy (atomic physics seminar)
Apr 7 - University of Rome, "La Sapienza" (Tomassoni Prize Lecture)
Apr 10 - Heraeus Summer School, Bad Honnef, Germany (antiproton lecture)
Apr 11 - Heraeus Summer School, Bad Honnef, Germany (antiprotons in traps lecture)
Apr 11 - Heraeus Summer School, Bad Honnef, Germany (antihydrogen lecture)
May 6 - University of Mainz (physics colloquium)
May 7 - University of Mainz (antihydrogen lecture)
May 12 - University of Bonn (physics colloquium)
May 20 - Lancaster University, UK (physics colloquium)
May 21 - Cockcroft Institute, Cheshire, UK (physics seminar)
May 30 - Mass ECT Workshop, Trento, Italy (invited lecture)
June 3 - GSI, Darmstadt (physics colloquium)
June 4 - University of Copenhagen (Neils Bohr Lecture)
June 10 - University of Innsbruck (physics colloquium)
July 28 - International Conference on Atomic Physics, Storrs, CT (invited lecture)
Aug 13 - Generating Capital for the Christian Mind Conference; The Needs and Opportunities: The Physical Sciences (panelist)
Aug 26 - Conference on Exploring Fundamental Problems in Science, Brujuni, Croatia (invited magnetic moment lecture)
Aug 28 - Conference on Exploring Fundamental Problems in Science, Brujuni, Croatia (invited antihdyrogen lecture)
Dec 5 - The College of William & Mary (William Small Distinguished Lecturer)
Jan 27 - CERN SPSC, Geneva, Switzerland
Mar 13 - Veritas Lecture, MIT (open evening lecture)
May 11 - New Opportunities in the Physics Landscape, Geneva, Switzerland (invited lecture)
May 29 - Conference on the Intersections of Particle and Nuclear Physics (CIPANP 2009) (invited lecture)
June 2 - Workshop on Atomic Physics with Rare Atoms, Univeristy of Michigan (invited lecture)
June 16 - Science, Philosophy and Belief Conference, Peking Univeristy, China (keynote speaker)
Aug 31 - Mazurian Lakes Conference on Physics: Nuclear Physics and the Road to FLAIR, Piaski, Poland (invited lecture)
Nov 12 - Missouri University of Science and Technology (physics colloquium)
Nov 13 - Northwestern University (physics colloquium)
Jan 19 - CERN SPSC, Geneva, Switzerland
Apr 2 - Cornell Particle Physics Seminar (invited lecture)
Apr 12 - Trapped Charged Particles Conference, Saariselka, Finland invited lecture)
May 18 - University of Milan (annual physics colloquium)
June 17 - Brookhaven National Laboratory (Vernon Hughes Memorial Lecture)
July 1 - CPT and Lorentz Symmetry Conference, Indiana University (invited lecture)
July 20 - Lepton Moments International Symposium, Cape Cod, MA (invited lecture)
Sept 6 - Cold Rydberg Gases and Ultracold Atoms (CRYP10), Dresden, Germany (invited lecture)
Sept 6 - University of Dresden, Germany (physics colloquium)
Oct 15 - NRC Committee of Atomic, Molecular and Optical Sciences (CAMOS), Biosphere 2, Oracle, AZ (invited lecture)
Nov 5 - Second Annual Vernon W. Hughes Lecture, Yale (invited lecture)
Jan 12 - University of Victoria (physics colloquium)
Jan 13 - University of British Columbia (physics colloquium)
Feb 18 - American Academy of Arts and Sciences Annual Meeting (invited lecture)
Mar 11 - Calvin College, Grand Rapids, MI (APS Lilienfeld Prize Lecture)
Mar 17 - TRIUMF, Vancouver (physics colloquium)
June 13 - American Physical Society, Division of Atomic, Molecular and Optical Physics (DAMOP), Atlanta (graduate symposium)
June 14 - American Physical Society, Division of Atomic, Molecular and Optical Physics (DAMOP), Atlanta (Lilienfeld Prize Lecture)
July 23 - International Workshop on Low-Energy Positron and Positronium Physics (POSMOL), Maynooth, Ireland (invited lecture)
Sept 5 - International Conference on Exotic Atoms and Related Topics, Vienna (invited lecture)
Sept 6 - Precision Measurements in Physics Symposium (in celebration of Ingmar Bergstrom's 90th birthday), Stockholm (invited lecture)
Oct 6 - Amherst College (physics colloquium)
Dec 2 - U.S. Department of Energy, Fundamental Physics at the Intensity Frontier (invited lecture)
Jan 6 - AFOSR, Atomic, Molecular and Optical Physics Program Review (invited lecture)
Jan 17 - CERN, SPSC, Geneva
Jan 18 - Physics at FOM, Veldhoven, Netherlands (invited lecture)
Feb 20 - George Fox University, Newberg, OR (Dalton Lecture)
Apr 12 - University of Chicago, (physics colloquium -APS Lilienfeld Prize Lecture)
May 3 - Physics Prospects at FLAIR Workshop, GSI, Darmstadt (invited lecture)
May 11 - Seattle Pacific University (Erickson Undergraduate Research Lecture)
May 14 - University of Washington, Seattle (physics colloquium)
June 18 - Symmetries in Subatomic Physics Symposium, Groningen, Netherlands (keynote address)
Sept 10 - European Conference on Trapped Ions (ECTI), Obergurfl, Austria
Jan 15 - CERN, SPSC, Geneva
Jan 18 - Partners in Science Program National Conference for High School Teachers, Murdock Charitable Trust, San Diego, CA (plenary lecture)
Jan 24 - Michigan State University (physics colloquium)
Jan 24 - Michigan State University (science and religion lecture)
Feb 22 - American Physical Society, Unit Leadership Convocation, College Park, MD (invited lecture)
Apr 12 - Texas A&M University, College Station, TX (Trotter Prize Lecture)
Apr 19 - Argonne National Lab (physics colloquium)
Apr 22 - Institute for Advanced Study, Princeton, NJ (physics colloquium)
June 14 - International Conference of Low Energy Antiproton Physics, Uppsala, Sweden (invited lecture)
June 15 - Uppsala, Sweden (invited public lecture)
June 18 - SLAC National Accelerator Laboratory, Standord (experimental seminar series lecture)
July 25 - Course of the International School of Physics on Ion Traps for Tomorrow's Applications, Varenna, Italy (fundamental measurements lecture 1)
July 26 - Course of the International School of Physics on Ion Traps for Tomorrow's Applications, Varenna, Italy (fundamental measurements lecture 2)
July 28 - Course of the International School of Physics on Ion Traps for Tomorrow's Applications, Varenna, Italy (fundamental measurements lecture 3)
Aug 9 - International Symposium on Science Explored by Ultra Slow Muon, Matsue, Japan (invited lecture)
Aug 28 - International Conference of New Frontiers in Physics, Kolymbari, Crete (invited plenary lecture)
Sept 11 - Physics of FundamentalSymmetries and Interactions at Low Energies and the Precision Frontier, Paul Scherrer Institute, Switzerland (invited lecture)
Sept 12 - Leopoldina Symposium on Spectroscopy and Molecular Dynamics at the Limit, ETH, Zurich (invited lecture)
Sept 19 - Institute of Research into Fundamental Laws of the Universe, CEA, Saclay, LFrance (physics colloquium)
Oct 11 - Bonn Humboldt Award Winners' Forum on Frontiers in Quantum Optics: Taming the World of Atoms and Photons - 100 Years After Niels Bohr (invited lecture)
Oct 31 - SPARC Workshop, Jena, Germany (invited lecture)
Nov 19 - Fermi National Accelerator Laboratory (student lecture)
Nov 20 - Fermi National Accelerator Laboratory (physics colloquium)
Nov 21 - Fermi National Accelerator Laboratory (student lecture)
Jan 10 - Fermi National Accelerator Laboratory, Joint Experimental-Theoretical Physics Seminar (wine and chees seminar)
Jan 14 - CERN SPSC, Geneva
Apr 8 - Boston University (Benson T. Chertok Lecture)
Apr 11 - Innsbruck-Vienna SSFB Meeting, Vienna (invited lecture)
Apr 22 - University of Mainz (physics colloquium)
Apr 25 - University of Massachusetts, Amherst, (physics colloquium)
May 1 - University of California, Riverside (physics and astronomy colloquium)
May 8 - CERN Workshop: Questioning Fundamental Principles, Geneva, Switzerland (invited lecture)
May 11 - Tel Aviv University (Sackler Distinguished Lecture in Physics and Eisenberg Memorial Colloquium)
June 2 - Particlegenesis, Kavli Institute for Theoretical Physics, Santa Barbara (invited lecture)
June 5 - American Physical Society, Division of Atomic, Molecular and Optical Physics (DAMOP), Madison, WI (invited lecture)
Sept 18 - 5th International Conference on Exotic Atoms 2014, Vienna, Austria (invited lecture)
Oct 1 - University of Notre Dame (physics colloquium)
Oct 6 - University of Washington, Seattle (physics colloquium)
Oct 14 - Univ. of Connecticut (physics colloquium)
Jan 14 - CERN SPSC
Jan 20 - Northwestern University, Evanston, IL (physics colloquium)
Feb 16 - Colorado State University (physics colloquium)
Apr 27 - International Workshop on Baryon and Lepton Number Violation, BLV 2015, Amherst, MA (plenary lecture)
May 28 - European Union "Historic Site" Designation of the Institute for Radium Research (now the Stefan Meyer Institute), Vienna, Austria (evening commemorative lecture)
June 9 - Annual DAMOP Meeting, Columbus, Ohio (evening public lecture)
June 11 - Jagiellonian Lecture (evening popular lecture)
June 28 - International Conference on Laser Science (ICOLS 2015), Singapore (keynote lecture)
July 29 - High Energy Physics Meeting of the European Physical Society, Vienna, Austria (plenary lecture)
Aug 29 - Univ. of Notre Dame Celebration of H. Gordon Berry (plenary lecture)
Sept 4 - Ringwald Conference of the Max Planck Institute for Quantum Optics, Ringwald, Germany (plenary lecture)
Sept 18 - German Leopoldina Academy of Sciences, Halle, Germany (plenary lecture)
Sept 21 - US - Japan QELS-12, Madison, Wisconsin (invited lecture)
Nov 20 - Ohio State University (physics colloquium)
Jan 19 - CERN SPSLC
Jan 20 - Annual Dutch National Physics Society Conference, Veldhoven, The Netherlands (invited lecture)
Apr 19 - APS Meeting in Salt Lake City, Utah (plenary lecture celibrating 60 years since the discovery of parity violation)
June 7 - Munich Inst. for Astro and Particle Physics (invited lecture)
June 20 - CPT-16, Bloomington, IN (invited lecture)
June 29 - Humboldt Kolleg on Particle Physics, Kitzbühel, Austria (keynote lecture)
Dec 14 - Quantum Sensing for High Energy Physics, Argonne National Laboratory, Invited Talk
(The record of talks for 2017 was lost in transition and has yet to be reconstructed.)
Jan 23 - CERN SPSC
Feb 23 - National Science Foundation (invited talk)
April 24 - Cambridge Roundtable on Science and Religion, Harvard University (after dinner talk)
May 21 - COFI "Searching for Physics Beyond the Standard Models Using Charged Leptons" workshop, Puerto Rico (invited talk)
June 12 - 7th International Symposium on Symmetries in Subatomic Physics (SSP 2018), Aachen, Germany (invited talk)
July 26 - University of Chicago Philosophy of Physics Summer School (invited talk)
Oct 16 - University of Oxford detector workshop (invited talk)
Nov 26 - 6th Symposium on Prospects in the Physics of Discrete Symmetries, DISCRETE 2018, Vienna, Austria (invited talk)
Nov 29 - Wayne State University, Detroit, MI (physics colloquium)
Dec 3 - UCLA Schwingerfest (invited talk)
Dec 5 - Michigan State University (physics colloquium)
Jan 21 - CERN SPSC
Jan 25 - Baltimore Teacher Workshop (featured speaker)
Feb 27 - Fermilab Colloquium
Mar 13 - Argonne HEP Division Seminar
Apr 26 - University of Kentucky Physics and Astronomy Colloquium
May 6 - Conference on Flavor Physics and CP Violation (FPCP 2019), University of Victoria
May 15 - Eighth Meeting on CPT and Lorentz Symmetry, Indiana University
May 28 - DAMOP 2019 (invited talk)
June 24 - Humboldt Kolleg conference (invited talk)
July 19 - ASA, Wheaton College (plenary speaker)
Feb 3 - SPIE Photonics West (invited talk), San Francisco, CA
Apr 19 - April APS Meeting (invited talk)
Aug 21 - University of New Mexico Physics and Astronomy Colloquium
Sept 16 - Snowmass workshop on Fundamental Physics in Small Experiments (invited electron EDM lecture)
Sept 17 - Snowmass Workshop on Fundamental Physics in Small Experiments (invited electron electric dipole moment lecture)
Oct 14 - University of Birmingham, UK (physics colloquium)
Nov 18 - Fermilab SQMS Lecture - Cavities for One-Particle Qubits
Dec 9 - Fermilab SQMS Lecture - Prospects for Electron and Positron Moments Measurements
Feb 19 - Fermilab Public Lecture - Antimatter and Other Deep Mysteries
June 8 - ICTP-SAIFR conference (invited lecture)
July 2 - New Opportunities for Fundamental Physics Research with Radioactive Molecules (MIT, invited lecture)
Aug 25 - Moore and Sloan Electric Dipole Moment Workshop (invited talk)
Sept 2 - QuAMP 2021 conference (invited plenary talk)
Feb 11 - Williams College Colloquium
Oct 21 - Northwestern University, Physics and Astronomy Colloquium
Oct 27 - Northwestern University, Roundtable Talk on Science and Faith
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