Proceedings of the 5th International Workshop on Astronomy and Relativistic Astrophysics (IWARA2011); João Pessoa, Brazil, 9-11 October 2011; Editors: Valdir B. Bezerra, Marcelo J. Rebouças, Dimiter Hadjimichef, Cesar A. Zen Vasconcellos, Jorge E. Horvath, and Eugênio R. Bezerra de MelloOpen Access

WIGHTMAN FUNCTIONS IN DE SITTER AND ANTI-DE SITTER SPACETIMES IN THE PRESENCE OF COSMIC STRINGS

EUGÊNIO R. BEZERRA DE MELLO

EUGÊNIO R. BEZERRA DE MELLO

Departamento de Física-CCEN, Universidade Federal da Paraíba, J. Pessoa, PB, 58.059-970, Brazil

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https://doi.org/10.1142/S2010194512008318Cited by:1 (Source: Crossref)

Abstract

In this paper we evaluate the Wightman functions associated with a massive quantum scalar field in de Sitter and anti-de Sitter spacetimes in the presence of a cosmic string. Having these functions we calculate the corresponding renormalized vacuum expectation values of the field squared and present the behavior of the contributions induced by the cosmic string as function of the proper distance to it for different values of the parameter which codify the presence of this linear topological defect.

Keywords:

PACS: 98.80.Cq, 11.10.Gh, 11.27.+d

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