Two-dimensional weakly interacting Bose gas in the fluctuation region

Nikolay Prokof’ev and Boris Svistunov
Phys. Rev. A 66, 043608 – Published 11 October 2002
PDFExport Citation

Abstract

We study the crossover between the mean-field and critical behavior of the two-dimensional Bose gas throughout the fluctuation region of the Berezinskii-Kosterlitz-Thouless phase transition point. We argue that this crossover is described by universal (for all weakly interacting |ψ|4 models) relations between thermodynamic parameters of the system, including superfluid and quasicondensate densities. We establish these relations with high-precision Monte Carlo simulations of the classical |ψ|4 model on a lattice, and check their asymptotic forms against analytic expressions derived on the basis of the mean-field theory.

  • Received 14 June 2002

DOI:https://doi.org/10.1103/PhysRevA.66.043608

©2002 American Physical Society

Authors & Affiliations

Nikolay Prokof’ev and Boris Svistunov

  • Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003
  • Russian Research Center “Kurchatov Institute,” 123182 Moscow, Russia

References (Subscription Required)

Click to Expand
Issue

Vol. 66, Iss. 4 — October 2002

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×