Vortex reconnections in atomic condensates at finite temperature

被引：39

作者：

Allen, A. J. ^{[1
]}

Zuccher, S. ^{[2
]}

Caliari, M. ^{[2
]}

Proukakis, N. P. ^{[1
]}

Parker, N. G. ^{[1
]}

Barenghi, C. F. ^{[1
]}

机构：

[1] Newcastle Univ, Sch Math & Stat, Joint Quantum Ctr JQC Durham Newcastle, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

[2] Univ Verona, Dipartimento Informat, I-37134 Verona, Italy

来源：

PHYSICAL REVIEW A | 2014年 / 90卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

DYNAMICS; TURBULENCE; VORTICES;

D O I：

10.1103/PhysRevA.90.013601

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The study of vortex reconnections is an essential ingredient of understanding superfluid turbulence, a phenomenon recently also reported in trapped atomic Bose-Einstein condensates. In this work we show that, despite the established dependence of vortex motion on temperature in such systems, vortex reconnections are actually temperature independent on the typical length and time scales of atomic condensates. Our work is based on a dissipative Gross-Pitaevskii equation for the condensate, coupled to a semiclassical Boltzmann equation for the thermal cloud (the Zaremba-Nikuni-Griffin formalism). Comparison to vortex reconnections in homogeneous condensates further shows reconnections to be insensitive to the inhomogeneity in the background density.

引用

页数：5

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