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Hidden long-range order in a spin-orbit-coupled two-dimensional Bose gas

Lookup NU author(s): Dr Gary Liu

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This is the final published version of an article that has been published in its final definitive form by American Physical Society, 2017.

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Abstract

A spin-orbit-coupled two-dimensional Bose gas is shown to simultaneously possess quasi- and true long-range order in the total and relative phase sectors, respectively. The total phase undergoes a Berenzinskii-Kosterlitz-Thouless transition to a low-temperature phase with quasi-long-range order, as expected for a two-dimensional quantum gas. Additionally, the relative phase undergoes an Ising-type transition building up true long-range order, which is induced by the anisotropic spin-orbit coupling in combination with spin-dependent particle-particle interactions. Based on the Bogoliubov approach, expressions for the total- and relative-phase fluctuations are derived analytically for the low-temperature regime. Numerical simulations of the stochastic projected Gross-Pitaevskii equation give a good agreement with the analytical predictions.


Publication metadata

Author(s): Su SW, Liu IK, Gou SG, Liao R, Fialko O, Brand J

Publication type: Article

Publication status: Published

Journal: Physical Review A

Year: 2017

Volume: 95

Online publication date: 24/05/2017

Acceptance date: 20/09/2016

Date deposited: 18/03/2020

ISSN (print): 2469-9926

ISSN (electronic): 2469-9934

Publisher: American Physical Society

URL: https://doi.org/10.1103/PhysRevA.95.053629

DOI: 10.1103/PhysRevA.95.053629


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