Fluctuation Exchange Approximation for Bose-Einstein Condensates

被引：0

作者：

Kita, Takafumi ^{[1
]}

机构：

[1] Hokkaido Univ, Dept Phys, Sapporo 0600810, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2023年 / 92卷 / 10期

关键词：

GROUND-STATE ENERGY; CONSERVING APPROXIMATIONS; ELECTRON-SYSTEMS; SUPERFLUID; FORMALISM;

D O I：

10.7566/JPSJ.92.104401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The grand thermodynamic potential for Bose-Einstein condensates is formulated in a form of the Luttinger-Ward functional so as to satisfy the Hugenholtz-Pines theorem on single-particle excitations and also incorporate collective fluctuations in a generalized fluctuation exchange approximation. It will form a basis for studying thermodynamic, linear-response, and dynamical properties of correlated Bose-Einstein condensates continuously from above Tc down to T = 0.

引用

页数：8

共 31 条

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[2]

Amit DJ., 1978, Field Theory, Renormalization Group, and Critical Phenomena

[3] SELF-CONSISTENT APPROXIMATIONS IN MANY-BODY SYSTEMS [J].