Multiple-scale approach for the expansion scaling of superfluid quantum gases

被引：4

作者：

Egusquiza, I. L. ^{[1
]}

Modugno, M. ^{[1
,2
]}

Valle Basagoiti, M. A. ^{[1
]}

机构：

[1] Univ Basque Country, Dept Theoret Phys & Hist Sci, E-48080 Bilbao, Spain

[2] Basque Fdn Sci, IKERBASQUE, E-48011 Bilbao, Spain

来源：

PHYSICAL REVIEW A | 2011年 / 84卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.84.043629

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a general method, based on a multiple-scale approach, for deriving the perturbative solutions of the scaling equations governing the expansion of superfluid ultracold quantum gases released from elongated harmonic traps. We discuss how to treat the secular terms appearing in the usual naive expansion in the trap asymmetry parameter epsilon and calculate the next-to-leading correction for the asymptotic aspect ratio, with significant improvement over the previous proposals.

引用

页数：5

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