Effect of nonzero temperature to non-condensed fraction of a homogeneous dilute weakly interacting Bose gas

被引：0

作者：

Van Thu, Nguyen ^{[1
]}

Thanh, Pham Duy ^{[1
]}

机构：

[1] Hanoi Pedag Univ 2, Dept Phys, Hanoi 10000, Vietnam

来源：

PHYSICS LETTERS A | 2024年 / 523卷

关键词：

Bose gas; Quantum and thermal fluctuations; Non-condensed fraction; Improved Hartree-Fock approximation; TRANSITION-TEMPERATURE; EINSTEIN CONDENSATION; GROUND-STATE; SYSTEM; THERMODYNAMICS; EXCITATIONS; VORTEX;

D O I：

10.1016/j.physleta.2024.129787

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

This study aims to investigate the effect of nonzero temperature to the non-condensed fraction of a homogeneous repulsive weakly interacting Bose gas in region of sufficiently low temperature. Within improved Hartree-Fock approximation, the Cornwall-Jackiw-Tomboulis effective action approach shows that the thermal fluctuations make the non-condensed fraction increase as a second and fourth-order power law of temperature. Indeed, the effect of non-infinite size of the trap is also integrated. The result is compared with experimental data.

引用

页数：6

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