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Phase coherence in quasicondensate experiments: an ab initio analysis via the stochastic Gross-Pitaevskii equation | | D. Gallucci
; S. P. Cockburn
; N. P. Proukakis
; | | Date: |
28 May 2012 | | 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, 155-163 (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 $mu ~ few hbar omega_perp$. We also numerically implement an
alternative identification of $T_{phi}$, based on direct analysis of the
distribution of phases in a stochastic treatment. | | Source: | arXiv, 1205.6075 | | Services: | Forum | Review | PDF | Favorites | |
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