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Lookup NU author(s): Dr Gary Liu,
Professor Nikolaos Proukakis
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
The dynamical evolution of an inhomogeneous ultracold atomic gas quenched at different controllable rates through the Bose-Einstein condensation phase transition is studied numerically in the premise of a recent experiment in an anisotropic harmonic trap. Our findings based on the stochastic (projected) Gross-Pitaevskii equation are shown to be consistent at early times with the predictions of the homogeneous Kibble-Zurek mechanism. This is demonstrated by collapsing the early dynamical evolution of densities, spectral functions and correlation lengths for different quench rates, based on an appropriate characterization of the distance to criticality felt by the quenched system. The subsequent long-time evolution, beyond the identified dynamical critical region, is also investigated by looking at the behavior of the density wavefront evolution and the corresponding phase ordering dynamics.
Author(s): Liu I-K, Dziarmaga J, Gou S-C, Dalfovo F, Proukakis NP
Publication type: Article
Publication status: Published
Journal: Physical Review Research
Online publication date: 03/08/2020
Acceptance date: 07/07/2020
Date deposited: 04/08/2020
ISSN (electronic): 2643-1564
Publisher: American Physical Society
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