Phase-fluctuating 3D Bose-Einstein condensates in elongated traps

被引：144

作者：

Petrov, DS

Shlyapnikov, GV

Walraven, JTM

机构：

[1] FOM, Inst Atom & Mol Phys, NL-1098 SJ Amsterdam, Netherlands

[2] Ecole Normale Super, Lab Kastler Brossel, F-75231 Paris 05, France

[3] Univ Paris 06, CNRS, Lab Kastler Brossel, F-75231 Paris 05, France

[4] Russian Res Ctr, Kurchatov Inst, Moscow 123182, Russia

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.87.050404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We find that in very elongated 3D trapped Bose gases, even at temperatures far below the BEC transition temperature T-c, the equilibrium state will be a 3D condensate with fluctuating phase (quasicondensate). At sufficiently low temperatures the phase fluctuations are suppressed and the quasicondensate turns into a true condensate. The presence of the phase fluctuations allows for extending thermometry of Bose-condensed gases well below those established in current experiments.

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页码：50404 / 1

页数：4

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