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Atomic Physics Seminars

ics Atomic
Monday, November 26, 2018
3:30 PM
Physics Building, Room 313
Note special time.
Note special room.
Stanimir Kondov [Host: Peter Schauss]
Colombia University
"Precision Measurement and Quantum Chemistry with Ultracold 88Sr2 Molecules"

At Tanya Zelevinsky’s lab at Columbia, our current effort focuses on characterizing the strontium molecule with the goal to develop an ultra-precise molecular clock---similar to better-known atomic optical clocks---with unique sensitivity to the fundamental constants of nature such as the gravitational constant G and the electron-to-proton mass ratio. Through precision measurements, one may investigate fundamental problems that are otherwise studied in high-energy (accelerator) research and astrophysical observations.

The implementation of a molecular clock relies on detailed knowledge of the Sr2 molecule. Studies of photodissociation, combined with spectroscopic data, have helped develop a state-of-the-art quantum chemistry model. The predictive value of the model is tested against experimental photodissociation data with remarkable complexity. The model faithfully reproduces the photofragment distributions and helps illuminate a quantum-to-classical crossover in dissociation dynamics.

We have demonstrated the operation of a molecular clock by coherently transferring molecules from a shallow bound state to near the bottom of the molecular potential. Using a magic wavelength technique, we have improved transition quality by 3.5 orders of magnitude, projecting a clock accuracy better than 10-14.

To add a speaker, send an email to phys-speakers@Virginia.EDU. Please include the seminar type (e.g. Atomic Physics Seminars), date, name of the speaker, title of talk, and an abstract (if available).