Skip to Main content Skip to Navigation
Journal articles

Finite-temperature hydrodynamics for one-dimensional Bose gases: Breathing-mode oscillations as a case study

Abstract : We develop a finite-temperature hydrodynamic approach for a harmonically trapped one-dimensional quasi-condensate and apply it to describe the phenomenon of frequency doubling in the breathing-mode oscillations of the quasicondensate momentum distribution. The doubling here refers to the oscillation frequency relative to the oscillations of the real-space density distribution, invoked by a sudden confinement quench. By constructing a nonequilibrium phase diagram that characterises the regime of frequency doubling and its gradual disappearance , we find that this crossover is governed by the quench strength and the initial temperature, rather than by the equilibrium-state crossover from the quasicondensate to the ideal Bose gas regime. The hydrodynamic predictions are supported by the results of numerical simulations based on a finite-temperature c-field approach, and extend the utility of the hydrodynamic theory for low-dimensional quantum gases to the description of finite-temperature systems and their dynamics in momentum space.
Complete list of metadatas

Cited literature [50 references]  Display  Hide  Download

https://hal-iogs.archives-ouvertes.fr/hal-01422001
Contributor : Isabelle Bouchoule <>
Submitted on : Friday, December 23, 2016 - 1:32:33 PM
Last modification on : Wednesday, September 16, 2020 - 5:45:47 PM
Long-term archiving on: : Tuesday, March 21, 2017 - 1:15:53 AM

File

hydro-breathing-arxiv.pdf
Files produced by the author(s)

Identifiers

Citation

Isabelle Bouchoule, S Szigeti, M Davis, K Kheruntsyan. Finite-temperature hydrodynamics for one-dimensional Bose gases: Breathing-mode oscillations as a case study. Physical Review A, American Physical Society, 2016, 94, pp.051602(R). ⟨10.1103/PhysRevA.94.051602⟩. ⟨hal-01422001⟩

Share

Metrics

Record views

683

Files downloads

286