Application of renormalization-group techniques to a homogeneous Bose gas at finite temperature

Authors
Andersen, JO Strickland, M
Citation
Jo. Andersen et M. Strickland, Application of renormalization-group techniques to a homogeneous Bose gas at finite temperature, PHYS REV A, 60(2), 1999, pp. 1442-1450
Citations number
45
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW A
ISSN journal
10502947 → ACNP
Volume
60
Issue
2
Year of publication
1999
Pages
1442 - 1450
Database
ISI
SICI code
1050-2947(199908)60:2<1442:AORTTA>2.0.ZU;2-H
Abstract
A homogeneous Bose gas is investigated at finite temperature using renormal ization-group techniques. A nonperturbative flow equation for the effective potential is derived using sharp and smooth cutoff functions. Numerical so lutions of these equations show that the system undergoes a second-order ph ase transition in accordance with universality arguments. We obtain the cri tical exponent nu = 0.73. [S1050-2947(99)09007-1].