Massless minimally coupled scalar field in de Sitter space

Allen, Bruce; Folacci, Antoine

doi:10.1103/PhysRevD.35.3771

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Massless minimally coupled scalar field in de Sitter space

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Allen, Bruce
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Citation

Allen, B., & Folacci, A. (1987). Massless minimally coupled scalar field in de Sitter space. Physical Review D, 35(12), 3771-3778. doi:10.1103/PhysRevD.35.3771.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-5DA4-3

Abstract

We quantize the massless minimally coupled scalar field in de Sitter space, and find a one-complex-parameter family of O(4)-invariant Hadamard Fock vacua which break de Sitter invariance. The different Fock spaces corresponding to the different choices of vacuum are subspaces of a single space of states. We make some remarks about the existence of E(3)- and O(1,3)-invariant Fock vacuum states.