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- W2047854232 abstract "Using an imaginary time formalism, we propose a consistent renormalizable perturbation theory of a scalar field in a non-trivial α vacuum in de Sitter space. Although one representation of the effective action involves non-local interactions between anti-podal points, we argue the theory leads to causal physics when continued to real-time, and we prove a spectral theorem for the interacting two-point function. We construct the renormalized stress energy tensor and show this develops no imaginary part at leading order in the interactions, consistent with stability." @default.
- W2047854232 created "2016-06-24" @default.
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- W2047854232 date "2003-10-01" @default.
- W2047854232 modified "2023-10-03" @default.
- W2047854232 title "A note on α-vacua and interacting field theory in de Sitter space" @default.
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- W2047854232 doi "https://doi.org/10.1016/j.nuclphysb.2003.07.014" @default.
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