Generalized Bogoliubov Transformation for Confined Fields: Applications in Casimir Effect

Details Generalized Bogoliubov Transformation for Confined Fields: Applications in Casimir Effect Generalized Bogoliubov Transformation for Confined Fields: Applications in Casimir Effect

2002-08-26

arxiv.org/abs/hep-th/0208183v1

Physics

High Energy Physics

High Energy Physics - Theory

20 pages, latex(article)

Scientific paper

10.1103/PhysRevA.66.052101

The Bogoliubov transformation in thermofield dynamics, an operator formalism for the finite-temperature quantum-field theory, is generalized to describe a field in arbitrary confined regions of space and time. Starting with the scalar field, the approach is extended to the electromagnetic field and the energy-momentum tensor is written via the Bogoliubov transformation. In this context, the Casimir effect is calculated for zero and non-zero temperature, and therefore it can be considered as a vacuum condensation effect of the electromagnetic field. This aspect opens an interesting perspective for using this procedure as an effective scheme for calculations in the studies of confined fields, including the interacting fields.

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