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Interaction between Maxwell field and charged scalar field in de Sitter universe

Cosmin Crucean

West University of Timişoara, V. Parvan Ave. 4, RO-300223 Timişoara, Romania

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and

Mihaela-Andreea Băloi

West University of Timişoara, V. Parvan Ave. 4, RO-300223 Timişoara, Romania

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https://doi.org/10.1142/S0217751X15500888Cited by:14 (Source: Crossref)

Abstract

We study the theory of interaction between charged scalar field and Maxwell field in de Sitter background. Solving the equation of interacting fields, we define the in–out fields as asymptotic free fields and construct the reduction formalism for scalar field. Then we derive the perturbation expansion of the scattering operator. The first-order transition amplitudes corresponding to particle production from de Sitter vacuum and pair production in an external field are analyzed. We show that all these effects are important only in strong gravitational fields and vanish in the flat limit.

Keywords:

PACS: 04.62.+v

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