On the entropy operator for the general SU(1,1) TFD formulation

被引：9

作者：

Abdalla, MCB ^{[1
]}

Gadelha, AL ^{[1
]}

Nedel, DL ^{[1
]}

机构：

[1] UNESP, Inst Fis Teor, BR-01405900 Sao Paulo, Brazil

来源：

PHYSICS LETTERS A | 2005年 / 334卷 / 2-3期

基金：

巴西圣保罗研究基金会;

关键词：

D O I：

10.1016/j.physleta.2004.11.025

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this Letter, an entropy operator for the general unitary SU(1, 1) TFD formulation is proposed and used to lead a bosonic system from zero to finite temperature. Namely, considering the closed bosonic string as the target system, the entropy operator is used to construct the thermal vacuum. The behaviour of such a state under the breve conjugation rules is analyzed and it was shown that the breve conjugation does not affect the thermal effects. From this thermal vacuum the thermal energy, the entropy and the free energy of the closed bosonic string are calculated and the appropriated thermal distribution for the system is found after the free energy minimization. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：123 / 131

页数：9

共 26 条

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