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.
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页数：6
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