Nonperturbative effects on the critical temperature of interacting Bose gases in power-law traps

O Zobay, G Metikas, H Kleinert

Research output: Contribution to journalArticle (Academic Journal)peer-review

11 Citations (Scopus)

Abstract

The critical temperature Tc of an interacting Bose gas trapped in a general power-law potential is studied with the help of variational perturbation theory. We calculate the interaction-induced shift in Tc below second order in the scattering length and show that it can be decomposed into a perturbative and a nonperturbative contribution. Our result quantitatively shows how an increasingly inhomogeneous potential suppresses the influence of critical fluctuations. The analytical form of the nonperturbative term is explained qualitatively with the help of the Ginzburg criterion.
Translated title of the contributionNonperturbative effects on the critical temperature of interacting Bose gases in power-law traps
Original languageEnglish
Article numberArticle no. 043614
Pages (from-to)043614
Number of pages10
JournalPhysical Review A: Atomic, Molecular and Optical Physics
Volume71
DOIs
Publication statusPublished - Apr 2005

Bibliographical note

Publisher: American Physical Society

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