My group uses atoms and molecules to look for cracks in the structure of physical laws. Our projects involve

  • using discrete symmetry violation to probe physics beyond the Standard Model
  • testing quantum electrodynamics using hydrogen
  • building new kinds of atomic clocks

Recent work

  1. Nuclear T-violation search using octupole-deformed nuclei in a crystal Phys. Rev. A (2023)
  2. Optical control of BaF molecules trapped in neon ice New J. Phys. (2023)

Selected older publications

  1. A measurement of the atomic hydrogen Lamb shift and the proton charge radius, Science (2019)
  2. Magic polarization for light shift cancellation in two-photon optical clocks, Phys. Rev. A (2019)
  3. Improved estimate of the collisional frequency shift in Al+ clocks, Phys. Rev. Research (2019)
  4. Optical frequency standards for gravitational wave detection using satellite Doppler velocimetry, New. J. Phys. (2015)
  5. Order of magnitude smaller limit on the electric dipole moment of the electron, Science (2014)



Code and hardware designs developed in my group are available at


Perhaps you are here for my list of content-free phrases?

ion trap


MP 033 (lab), MP 1121 (office)
Department of Physics
University of Toronto
60 St. George Street
Toronto ON M5S 1A7, Canada

Phone: +1 416 946 8503
Email: amar.vutha Ͽ

'MP' is the McLennan Physics building in the downtown campus.



  • Kristen Cote
  • Takahiro Tow
  • Dr. Scott Smale
  • Ben Dobozy
  • Daniel Stedman
  • Angela Xiang
  • Parveer Banwait
  • Dr. Mingyu Fan
  • Alison Okumura


  • Harish Ramachandran → Caltech
  • Julia Ford → Toronto
  • Shira Jackson, PhD
  • Samuel Li → Princeton
  • Dr. Rhys Anderson → Google
  • Reynold Chan → U Illinois
  • Dr. Kosuke Kato → National Research Council
  • Nishant Bhatt, PhD → ALPHA Collaboration
  • Mohit Verma → U Chicago
  • Jinsoo Park → Queens U
  • Luca Talamo → U Colorado
  • Jack Davis → U Waterloo
  • Hiromitsu Sawaoka → Harvard
  • Wesley Cassidy → U British Columbia
  • Dr. Shreyas Potnis → Google
  • Dr. Graham Edge → JW Player
  • Jenny Wu → U Colorado