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- W2431372004 abstract "We address the following question: To what extent can a quantum field tell if it has been placed in de Sitter space? Our approach is to use the techniques of non-equilibrium quantum field theory to compute the time evolution of a state which starts off in flat space for (conformal) times $eta<eta_0$, and then evolves in a de Sitter background turned on instantaneously at $eta=eta_0$. We find that the answer depends on what quantities one examines. We study a range of them, all based on two-point correlation functions, and analyze which ones approach the standard Bunch-Davies values over time. The outcome of this analysis suggests that the nature of the equilibration process in this system is similar to that in more familiar systems." @default.
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- W2431372004 date "2015-02-12" @default.
- W2431372004 modified "2023-10-13" @default.
- W2431372004 title "Equilibration of a quantum field in de Sitter space-time" @default.
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- W2431372004 doi "https://doi.org/10.1103/physrevd.91.043517" @default.
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