A short introduction to the fate of the alpha-vacuum
classification
✦ hep-th
keywords
divergencesintroductionalpha-vacuaalpha-vacuumbriefbunch-daviescalledexcept
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A free scalar field propagating in de Sitter space has a one parameter family of invariant states called the alpha-vacua. In an interacting theory, all except a unique state, the Bunch-Davies vacuum, produce non-renormalizable divergences. This talk provides a brief introduction to the origin and the form of these divergences.
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