Yang–Yang thermodynamics of one-dimensional Bose gases with anisotropic transversal confinement

doi:10.1088/1674-1056/20/9/090501

中国物理B ›› 2011, Vol. 20 ›› Issue (9): 90501-090501.doi: 10.1088/1674-1056/20/9/090501

Yang–Yang thermodynamics of one-dimensional Bose gases with anisotropic transversal confinement

郝亚江¹, 尹相国²

(1)Department of Physics, University of Science and Technology Beijing, Beijing 100083, China; (2)Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2011-02-24 修回日期:2011-03-25 出版日期:2011-09-15 发布日期:2011-09-15

Yang–Yang thermodynamics of one-dimensional Bose gases with anisotropic transversal confinement

Hao Ya-Jiang (郝亚江)^a)^† and Yin Xiang-Guo(尹相国)^b)

^a Department of Physics, University of Science and Technology Beijing, Beijing 100083, China; ^b Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Received:2011-02-24 Revised:2011-03-25 Online:2011-09-15 Published:2011-09-15

摘要/Abstract

摘要： By combining the thermodynamic Bethe ansatz and local density approximation, we investigate the Yang—Yang thermodynamics of interacting one-dimensional Bose gases with anisotropic transversal confinement. It is shown that with the increase of anisotropic parameter at low temperature, the Bose atoms are distributed over a wider region, while at high temperature the density distribution is not affected obviously. Both the temperature and transversal confinement can strengthen the local pressure of the Bose gases.

Abstract: By combining the thermodynamic Bethe ansatz and local density approximation, we investigate the Yang—Yang thermodynamics of interacting one-dimensional Bose gases with anisotropic transversal confinement. It is shown that with the increase of anisotropic parameter at low temperature, the Bose atoms are distributed over a wider region, while at high temperature the density distribution is not affected obviously. Both the temperature and transversal confinement can strengthen the local pressure of the Bose gases.

Key words: Bose gas, thermodynamics, anisotropic transversal confinement

中图分类号: (Boson systems)

05.30.Jp

03.75.Hh (Static properties of condensates; thermodynamical, statistical, and structural properties) 67.85.-d (Ultracold gases, trapped gases)

郝亚江, 尹相国. Yang–Yang thermodynamics of one-dimensional Bose gases with anisotropic transversal confinement[J]. 中国物理B, 2011, 20(9): 90501-090501.

Hao Ya-Jiang (郝亚江) and Yin Xiang-Guo(尹相国) . Yang–Yang thermodynamics of one-dimensional Bose gases with anisotropic transversal confinement[J]. Chin. Phys. B, 2011, 20(9): 90501-090501.

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Yang–Yang thermodynamics of one-dimensional Bose gases with anisotropic transversal confinement

Yang–Yang thermodynamics of one-dimensional Bose gases with anisotropic transversal confinement

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