Quench dynamics of a strongly interacting resonant Bose gas
NOV 15, 2013 | 10:30 AM TO 12:00 PM
The Graduate Center
365 Fifth Avenue
November 15, 2013: 10:30 AM-12:00 PM
Initiative for the Theoretical Sciences (ITS) Quantum condensed matter and information theory seminar
Guest speaker: Leo Radzihovsky (Univ. of Colorado)
Host: Vadim Oganesyan
After an introductory overview of the ultra-cold atomic gases, I will discuss our recent work on dynamics of a Bose gas following its quench to a strongly interacting regime near a Feshbach resonance. Within a self-consistent Bogoliubov analysis we find that after the initial condensate-quasiparticle Rabi oscillations, at long time scales the gas is characterized by a nonequilibrium steady-state momentum distribution function, with depletion, condensate density and contact that deviate strongly from their corresponding equilibrium values. These are in a qualitative agreement with recent experiments on Rb85. Our analysis also suggests that for sufficiently deep quenches close to the resonance the nonequilibrium state undergoes a phase transition to a fully depleted state, characterized by a vanishing condensate density.
*Please let us know (ITS@gc.cuny.edu) that you will be attending, 3-4 days prior to the event.