Breakdown of the semiclassical approximation during the early stages of preheating
arXiv:1502.01892 · doi:10.1103/PhysRevD.92.083522
Abstract
The validity of the semiclassical approximation is investigated during the preheating phase in models of chaotic inflation using a modification of a criterion previously proposed for semiclassical gravity. If the modified criterion is violated then fluctuations of the two-point function for the quantum fields are large and the semiclassical approximation is not valid. Evidence is provided that the semiclassical approximation breaks down during the early stages of preheating, well before either scattering effects or backreaction effects are important.
9 pages, 2 figures
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Cited by in corpus (5)
- Numerical studies of back-reaction effects in an analog model of cosmological pre-heating
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- Ultraviolet-regularized power spectrum without infrared distortions in cosmological spacetimes
- Appearances are deceptive: Can graviton have a mass?
- Linear Response Analysis of the Semiclassical Approximation to Spin 1/2 Quantum Electrodynamics in 1+1 Dimensions