Atomic Physics Seminars This Term

ics Atomic
Monday, September 10, 2018
3:30 PM
Physics Building, Room 204

"Available"
ics Atomic
Monday, September 17, 2018
3:30 PM
Physics Building, Room 204
RESERVED
ics Atomic
Monday, September 24, 2018
3:30 PM
Physics Building, Room 203
Note special room.
Reserved for Special Colloquium
ics Atomic
Monday, October 1, 2018
3:30 PM
Physics Building, Room 204

"Available"
ics Atomic
Monday, October 8, 2018
3:30 PM
Physics Building, Room 204

"Available"
ics Atomic
Monday, October 15, 2018
3:30 PM
Physics Building, Room 204
RESERVED
ics Atomic
Monday, October 22, 2018
3:30 PM
Physics Building, Room 204

"Available"
ics Atomic
Monday, October 29, 2018
3:30 PM
Physics Building, Room 313
Note special room.
Seth Aubin [Host: Cass Sackett]
William & Mary
"Spin-specific AC Zeeman potentials"
ABSTRACT:

Spin-specific trapping and mechanical control of ultracold atoms is difficult with current techniques, but offers the possibility of exploring new physics systems, notably spin-dependent trapped atom interferometers, as well as quantum gates, 1D many-body spin gases, and novel cooling schemes. Microwave near-field potentials based on the AC Zeeman effect provide a mechanism for such spin-specific control of atoms: in principle, independent potentials can be targeted to different spin states simultaneously. We present recent experimental progress in implementing such control by using AC near-fields on an atom chip to drive hyperfine transitions and manipulate ultracold rubidium atoms.

ics Atomic
Monday, November 5, 2018
3:30 PM
Physics Building, Room 204

"Available"
ics Atomic
Monday, November 12, 2018
3:30 PM
Physics Building, Room 204
RESERVED
ics Atomic
Monday, November 19, 2018
3:30 PM
Physics Building, Room 204

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

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.

ics Atomic
Monday, December 3, 2018
3:30 PM
Physics Building, Room 204

"Available"

To add a speaker, send an email to ps5nw@Virginia.EDU Include the seminar type (e.g. Atomic Physics Seminars), date, name of the speaker, title of talk, and an abstract (if available). [Please send a copy of the email to phys-speakers@Virginia.EDU.]