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Kibble-Zurek dynamics in a trapped ultracold Bose gas

Lookup NU author(s): Dr Gary Liu, Professor Nikolaos Proukakis

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Abstract

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.


Publication metadata

Author(s): Liu I-K, Dziarmaga J, Gou S-C, Dalfovo F, Proukakis NP

Publication type: Article

Publication status: Published

Journal: Physical Review Research

Year: 2020

Volume: 2

Issue: 3

Online publication date: 03/08/2020

Acceptance date: 07/07/2020

Date deposited: 04/08/2020

ISSN (electronic): 2643-1564

Publisher: American Physical Society

URL: https://doi.org/10.1103/PhysRevResearch.2.033183

DOI: 10.1103/PhysRevResearch.2.033183


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