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Phase coherence in quasicondensate experiments: An ab initio analysis via the stochastic Gross-Pitaevskii equation

Lookup NU author(s): Dr Donatello Gallucci, Dr Stuart Cockburn, Professor Nikolaos ProukakisORCiD

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Abstract

We perform an ab initio analysis of the temperature dependence of the phase coherence length of finite-temperature, quasi-one-dimensional Bose gases measured in the experiments of Richard et al. [Phys. Rev. Lett. 91, 010405 (2003)] and Hugbart et al. [Eur. Phys. J. D 35, 155 (2005)], finding very good agreement across the entire observed temperature range (0.8 < T/T-phi < 28). Our analysis is based on the one-dimensional stochastic Gross-Pitaevskii equation, modified to self-consistently account for transverse, quasi-one-dimensional effects, thus making it a valid model in the regime where mu is approximately equal to a few (h) over bar omega(perpendicular to). We also numerically implement an alternative identification of T-phi, based on direct analysis of the distribution of phases in a stochastic treatment.

Publication metadata

Author(s): Gallucci D, Cockburn SP, Proukakis NP

Publication type: Article

Publication status: Published

Journal: Physical Review A

Year: 2012

Volume: 86

Issue: 1

Print publication date: 19/07/2012

ISSN (print): 1050-2947

ISSN (electronic):

Publisher: American Physical Society

URL: http://dx.doi.org/10.1103/PhysRevA.86.013627

DOI: 10.1103/PhysRevA.86.013627

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