2012/05/31 by D. Gallucci, Donatello Gallucci, S. P. Cockburn +1
Physics and Astronomy · #Ab initio #Ab initio quantum chemistry methods #Coherence (philosophical gambling strategy) #Cold Atom Physics and Bose-Einstein Condensates #Molecule #Phase (matter) #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quantum, superfluid, helium dynamics #Statistical physics #cond-mat.quant-gas
paper · pdf · doi:10.1103/physreva.86.013627
Amended manuscript with improved agreement to experiment, following some additional clarifications by Mathilde Hugbart and Fabrice Gerbier and useful comments by the reviewer; accepted for publication in Physical Review A
arxiv created 2012/06/28 · openalex publication_date 2012/07/19 · arxiv updated 2015/06/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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_\ensuremathφ<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 \ensuremathμ is approximately equal to a few \ensuremathℏ\ensuremathω_\ensuremath⊥. We also numerically implement an alternative identification of T_\ensuremathφ, based on direct analysis of the distribution of phases in a stochastic treatment.