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General Relativity and Quantum Cosmology

arXiv:0904.1273 (gr-qc)
[Submitted on 8 Apr 2009]

Title:Cosmological particle creation in states of low energy

Authors:Andreas Degner, Rainer Verch
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Abstract: 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.
Comments: 24 pages, 7 figures
Subjects: General Relativity and Quantum Cosmology (gr-qc); Cosmology and Nongalactic Astrophysics (astro-ph.CO); High Energy Physics - Theory (hep-th)
Cite as: arXiv:0904.1273 [gr-qc]
  (or arXiv:0904.1273v1 [gr-qc] for this version)
  https://doi.org/10.48550/arXiv.0904.1273
Journal reference: J.Math.Phys.51:022302,2010
Related DOI: https://doi.org/10.1063/1.3271106

Submission history

From: Rainer Verch [view email]
[v1] Wed, 8 Apr 2009 07:39:41 UTC (1,168 KB)
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