Cosmological particle creation in states of low energy

Details Cosmological particle creation in states of low energy Cosmological particle creation in states of low energy

2009-04-08

arxiv.org/abs/0904.1273v1

J.Math.Phys.51:022302,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

24 pages, 7 figures

Scientific paper

10.1063/1.3271106

The recently proposed states of low energy provide a well-motivated class of reference states for the quantized linear scalar field on cosmological Friedmann-Robertson-Walker spacetimes. The low energy property of a state is localized close to some value of the cosmological time coordinate. We present calculations of the relative cosmological particle production between a state of low energy at early time and another such state at later time. In an exponentially expanding Universe, we find that the particle production shows oscillations in the spatial frequency modes. The basis of the method for calculating the relative particle production is completely rigorous. Approximations are only used at the level of numerical calculation.

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