SQG5 - Quantum Fields |
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Speaker |
Morrison, Ian |
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Talk Title |
Interacting quantum fields in de Sitter |
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Abstract |
The study of quantum fields in de Sitter space offers a tractable model in which to investigate many of the conceptual issues that arise generically for quantum fields in curved spacetime. The study of free fields in de Sitter has taught us a great deal about issues such as the choice of vacuum, the definition and usefulness of the S-matrix, particle production, etc. Thus far studies of interacting fields in de Sitter have been fairly heuristic. The purpose of this talk is to present our recent study of interacting fields in de Sitter. We calculate propagators and Wightman functions in perturbative quantum field theory on a de Sitter background for various fields and interactions. Renormalizability, multi-particle effects, and IR behavior will be discussed. |
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