Particle production in inhomogeneous cosmologies

J. Céspedes, E. Verdaguer

    Research output: Contribution to journalArticleResearchpeer-review

    21 Citations (Scopus)

    Abstract

    A perturbative evaluation of the S matrix is used to compute the production of particles in an expanding flat Friedmann-Robertson-Walker universe in the presence of small inhomogeneities. We first consider the production of massless conformally coupled and weakly nonconformally coupled particles, obtaining known results, and then we consider the production of massive particles. The production of massive particles cannot be treated only perturbatively and a method is proposed to compute this in general. The pair-production probability is computed using two different, but related, methods: in one we directly evaluate the number of particles produced and in the other we concentrate mainly on the vacuum-to-vacuum or vacuum persistence amplitude. © 1990 The American Physical Society.
    Original languageEnglish
    Pages (from-to)1022-1033
    JournalPhysical Review D
    Volume41
    Issue number4
    DOIs
    Publication statusPublished - 1 Jan 1990

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