Vortex proliferation in the Berezinskii-Kosterlitz-Thouless regime on a two-dimensional lattice of bose-einstein condensates

被引：105

作者：

Schweikhard, V. ^{[1
]}

Tung, S.

Cornell, E. A.

机构：

[1] Natl Inst Stand & Technol, Joint Inst Lab Astrophys, Boulder, CO 80309 USA

[2] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 03期

关键词：

CONTINUOUS SYMMETRY GROUP; LONG-RANGE ORDER; TRANSITION; DESTRUCTION; SYSTEMS; TRAPS; ATOMS; GAS;

D O I：

10.1103/PhysRevLett.99.030401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We observe the proliferation of vortices in the Berezinskii-Kosterlitz-Thouless regime on a two-dimensional array of Josephson-coupled Bose-Einstein condensates. As long as the Josephson (tunneling) energy J exceeds the thermal energy T, the array is vortex free. With decreasing J/T, vortices appear in the system in ever greater numbers. We confirm thermal activation as the vortex-formation mechanism and obtain information on the size of bound vortex pairs as J/T is varied.

引用

页数：4

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