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International Journal of Modern Physics B

QUANTUM FLUCTUATIONS ENHANCE SUPERFLUIDITY IN TWO-DIMENSIONAL WEAKLY INTERACTING BOSON SYSTEM

Pei-Song He, Wen‐Long You

Published Jun 18, 2012• 1 citation
Publisher

Abstract

In the present paper, we compute the superfluid density of two-dimensional weakly interacting boson system at zero temperature using one-loop renormalization group calculations under the scheme of newly derived formula [M. Holzmann and G. Baym Phy. Rev. B 76, 092502 (2007)]. We find that the interactions between the boson particles are marginally irrelevant in the renormalization group sense. The fluctuations of high-energy scale enhance superfluid density compared with the result of the mean-field approximation. The correction has ( ln μ) form, where μ is the chemical potential of the boson system.

DOI
10.1142/s021797921250107x

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