Phonon Coupling's Role in the Non-Equilibrium Dynamics of a Quasicondensate
Abstract
Cold atoms loaded into cigar shaped traps can realize the Lieb Liniger model where the effective 1-D coupling constant depends both on the three-dimensional scattering length of the atomic species, and on the trap's transverse frequency. By performing a quantum quench of the transverse trapping frequency, non-equilbirum density and phase dynamics can be induced. In the low temperature regime, these dynamics are well characterized by Bogoliubov theory, however at higher temperatures intermode (i.e. phonon-phonon) coupling can become important. In this work we report on classical field simulations of a quasi condensate undergoing the quench protocol outlined above, and comment on the consequences of intermode coupling both for damping, and energy transfer.
This research is supported by the Natural Sciences and Engineering Research Council (NSERC) of Canada.- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..MARP24011P