Closed string thermal torus from thermo field dynamics


Autoria(s): Abdalla, MCB; Gadelha, A. L.; Nedel, D. L.
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

20/05/2014

20/05/2014

05/05/2005

Resumo

In this Letter a topological interpretation for the string thermal vacuum in the thermo field dynamics (TFD) approach is given. As a consequence, the relationship between the imaginary time and TFD formalisms is achieved when both are used to study closed strings at finite temperature. The TFD approach starts by duplicating the system's degrees of freedom, defining an auxiliary (tilde) string. In order to lead the system to finite temperature a Bogoliubov transformation is implemented. We show that the effect of this transformation is to glue together the string and the tilde string to obtain a torus. The thermal vacuum appears as the boundary state for this identification. Also, from the thermal state condition, a Kubo-Martin-Schwinger condition for the torus topology is derived. © 2005 Elsevier B.V. All rights reserved.

Formato

213-220

Identificador

http://dx.doi.org/10.1016/j.physletb.2005.03.048

Physics Letters B. Amsterdam: Elsevier B.V., v. 613, n. 3-4, p. 213-220, 2005.

0370-2693

http://hdl.handle.net/11449/23282

10.1016/j.physletb.2005.03.048

WOS:000228936000014

Idioma(s)

eng

Publicador

Elsevier B.V.

Relação

Physics Letters B

Direitos

closedAccess

Tipo

info:eu-repo/semantics/article