Bose-Einstein condensation of a relativistic Bose gas in a harmonic potential

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• 作者：Cong-Fei Du ; Xiang-Mu Kong ; ^{kongxm@mail.qfnu.edu.cn}
• 关键词：Bose&ndash ; Einstein condensation ; Relativistic Bose system ; Harmonic potential ; Antiboson
• 刊名：Physica B
• 出版年：2012
• 期刊代码：53_09214526
• 类别：ph
• 出版时间：15 June, 2012
• 卷：407
• 期：12
• 页码：1973-1977
• 文件大小：345 K

摘要

Using semiclassical method, Bose-Einstein condensation (BEC) of a relativistic ideal Bose gas (RIBG) with and without antibosons in the three-dimensional (3D) harmonic potential is investigated. Analytical expressions for the BEC transition temperature, condensate fraction, specific heat and entropy of the system are obtained. Relativistic effects on the properties of the system are discussed and it is found that the relativistic effect decreases the transition temperature T_c but enlarges the gap of specific heat at T_c. We also study the influence of antibosons on a RIBG. Comparing with the system without antibosons, the system with antibosons has a higher transition temperature and a lower Helmholtz free energy. It implies that the system with antibosons is more stable.