Quantum and Thermal Effects of Dark Solitons in a One-Dimensional Bose Gas

被引：61

作者：

Martin, A. D. ^{[1
]}

Ruostekoski, J. ^{[1
]}

机构：

[1] Univ Southampton, Sch Math, Southampton SO17 1BJ, Hants, England

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 19期

基金：

英国工程与自然科学研究理事会;

关键词：

DYNAMICS; NOISE;

D O I：

10.1103/PhysRevLett.104.194102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We numerically study the imprinting and dynamics of dark solitons in a bosonic atomic gas in a tightly confined one-dimensional harmonic trap both with and without an optical lattice. Quantum and thermal fluctuations are synthesized within the truncated Wigner approximation in the quasicondensate description. We track the soliton coordinates and calculate position and velocity uncertainties. We find that the phase fluctuations lower the classically predicted soliton speed and seed instabilities. Individual runs show interactions of solitons with sound waves, splitting, and disappearing solitons.

引用

页数：4

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