受硬壁限制的两个分离玻色-爱因斯坦凝聚体中的Nambu-Goldstone模

IF 1.1 3区物理与天体物理 Q4 PHYSICS, APPLIED

Journal of Low Temperature Physics Pub Date : 2025-03-12 DOI:10.1007/s10909-025-03285-4

Hoang Van Quyet

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引用次数: 0

摘要

在Gross-Pitaevskii理论的框架下，基于双抛物线近似方法，我们成功地得到了两种非混相玻色-爱因斯坦凝聚体（两个声子和一个波纹子）在硬壁约束下的三种NG模色散关系的表达式。对于不受硬壁限制的第一个凝聚组分，我们发现了一个声子和一个波纹子。同时，对于被硬壁限制的第二分量，我们只发现了一个声子（色散关系取决于硬壁的位置），这明确地表明了有限尺寸效应。

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Nambu-Goldstone Modes in Two Segregated Bose-Einstein Condensates Limited by a Hard Wall

In the framework of the Gross-Pitaevskii theory, based on the double-parabola approximation method, we successfully found the expressions for dispersion relations of three NG modes of two immiscible Bose-Einstein condensates restricted by a hard wall (two phonons and a ripplon). For the first condensate component, which is not confined by a hard wall, we found one phonon and one ripplon. Meanwhile, for the second component confined by a hard wall, we found only one phonon (the dispersion relation depends on the position of the hard wall), and this manifests explicitly the finite-size effect.

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来源期刊

Journal of Low Temperature Physics 物理-物理：凝聚态物理

CiteScore

3.30

自引率

25.00%

发文量

245

审稿时长

1 months

期刊介绍： The Journal of Low Temperature Physics publishes original papers and review articles on all areas of low temperature physics and cryogenics, including theoretical and experimental contributions. Subject areas include: Quantum solids, liquids and gases; Superfluidity; Superconductivity; Condensed matter physics; Experimental techniques; The Journal encourages the submission of Rapid Communications and Special Issues.