My group uses atoms and molecules to develop new tools for precision measurements. Our current research projects involve optical atomic clocks and molecular ion spectroscopy.

I am involved in the EDM3 and PolyEDM collaborations.

nuts and bolts

Recent work

  1. Improved estimate of the collisional frequency shift in Al+ optical clocks, arXiv (2019)
  2. Magic polarization for light shift cancellation in two-photon optical clocks, arXiv (2018)
  3. Doppler and collisional frequency shifts in trapped-atom clocks, arXiv (2018)
  4. Orientation-dependent hyperfine structure of polar molecules in a rare-gas matrix, Phys. Rev. A (2018)
  5. Laser frequency stabilization using a transfer interferometer, Rev. Sci. Intr. (2018)
  6. Oriented polar molecules for electron EDM measurements, Atoms (2018)
  7. Displacement operators: the classical face of their quantum phase, Eur. J. Phys. (2018)
  8. A compact external-cavity diode laser, using feedback from an optical fiber, Rev. Sci. Instr. (2017)
  9. Collisional frequency shift of a trapped-ion optical clock, Phys. Rev. A (2017)
  10. Broadband low-noise photodetector for Pound-Drever-Hall laser stabilization, Rev. Sci. Instr. (2016)
  11. Frequency-offset separated oscillatory fields, Phys. Rev. A (2015)
  12. Optical frequency standards for gravitational wave detection using satellite Doppler velocimetry, New. J. Phys. (2015)


Code and hardware designs developed in my group are freely available at

Pythagon is an older Python blog that I update sporadically.


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


I teach the following courses at UofT: Previous courses:


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, located in UofT's downtown campus.



  • Shira Jackson
  • Nishant Bhatt
  • Mohit Verma
  • Kristen Cote
  • Henry Vu
  • Dr. Kosuke Kato

Kosuke, Edward, Mohit, Kristen, Henry, Shira


  • Luca Talamo → U Colorado
  • Jack Davis → U Waterloo
  • Hiromitsu Sawaoka → Harvard
  • Wesley Cassidy → U British Columbia
  • Dr. Shreyas Potnis → Thalmic Labs
  • Dr. Graham Edge → JW Player
  • Jenny Wu → U Colorado