Lookup NU author(s): Dr Stuart Cockburn,
Professor Nikolaos Proukakis
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The stochastic Gross-Pitaevskii equation and modified Popov theory are shown to provide an excellent ab initio description of finite-temperature, weakly interacting, two-dimensional Bose gas experiments. In particular, we demonstrate that the stochastic Gross-Pitaevskii equation generates excellent agreement with the recent experiment by C.-L. Hung et al. [Nature 470, 236 (2011)], thereby confirming that the observed universality and scale invariance arise naturally within this formalism. This is achieved in an ab initio manner, in which a systematic approach for obtaining a suitable value for the momentum cutoff of interacting classical field theories is proposed by means of the modified Popov theory.
Author(s): Cockburn SP, Proukakis NP
Publication type: Article
Publication status: Published
Journal: Physical Review A
Print publication date: 10/09/2012
ISSN (print): 1050-2947
ISSN (electronic): 1094-1622
Publisher: American Physical Society
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