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arXiv 2409.14036cond-mat.quant-gas
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均匀非理想玻色气体的转变温度

Transition temperature of the homogeneous imperfect Bose gas

Nguyen Van Thu, Pham Duy Thanh

AI总结:

本文利用Cornwall-Jackiw-Tomboulis有效作用量形式体系在改进的Hartree-Fock近似下研究均匀稀薄玻色气体的转变温度移动,发现首阶修正与散射长度呈普适线性关系,且斜率与已有精确数值计算高度吻合。

摘要:

超越现有文献中的标准方法,我们在改进的Hartree-Fock近似下,利用Cornwall-Jackiw-Tomboulis有效作用量形式体系,研究了均匀稀薄玻色气体转变温度的相对移动。与理想玻色气体相比,转变温度增强的首个修正以普适形式表达:它与散射长度呈线性关系。该线性关系的斜率与先前研究中给出的精确数值计算结果表现出极好的一致性。此外,我们还识别出对移动有贡献的非普适项。

英文摘要:

Beyond standard approaches in existing literature, we explore the relative shift in the transition temperature of a homogeneous dilute Bose gas using the Cornwall-Jackiw-Tomboulis effective action formalism within the improved Hartree-Fock approximation. The first correction to the enhancement of the transition temperature, as compared to that of the ideal Bose gas, is expressed in a universal form: it is linear with respect to the scattering length. The slope of this linear relationship shows excellent agreement with the exact numerical calculations presented in previous studies. Additionally, we identify non-universal terms contributing to the shift.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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