Solution of the Dyson-Schwinger equation on de Sitter background in IR limit

Akhmedov, E. T.; Burda, Ph.

doi:10.1103/PhysRevD.86.044031

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Solution of the Dyson-Schwinger equation on de Sitter background in IR limit

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Akhmedov, E. T.
Quantum Gravity and Unified Theories, AEI Golm, MPI for Gravitational Physics, Max Planck Society;

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Akhmedov, E. T., & Burda, P. (2012). Solution of the Dyson-Schwinger equation on de Sitter background in IR limit. Physical Review D, 86(4): 044031. doi:10.1103/PhysRevD.86.044031.

Cite as: https://hdl.handle.net/11858/00-001M-0000-000F-3F94-0

Abstract

We propose an ansatz which solves the Dyson-Schwinger equation for the real scalar fields in Poincare patch of de Sitter space. In the IR limit the Dyson-Schwinger equation for this ansatz reduces to the kinetic equation, if one considers scalar fields from the principle series. Solving the latter equation we show that under the adiabatic switching on and then off the coupling constant the Bunch-Davies vacuum relaxes to the state with the flat Gibbons-Hawking density of out-Jost harmonics on top of the corresponding de Sitter invariant out--vacuum.