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Decoherence problem in an ekpyrotic phase

Tseng, Chien-Yao (2013) Decoherence problem in an ekpyrotic phase. Physical Review D, 87 (2). Art. No. 023518 . ISSN 2470-0010. doi:10.1103/PhysRevD.87.023518.

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Quantum decoherence and the transition to semiclassical behavior during inflation have been extensively considered in the literature. In this paper, we use a simple model to analyze the same process in ekpyrosis. Our result is that the quantum to classical transition would not happen during an ekpyrotic phase even for superhorizon modes, and therefore the fluctuations cannot be interpreted as classical. This implies the prediction of a scale-free power spectrum in an ekpyrotic/cyclic universe model requires more inspection.

Item Type:Article
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Additional Information:© 2013 American Physical Society. Received 15 October 2012; published 24 January 2013. This work is supported by the U.S. Department of Energy. We especially thank S. M. Carroll for very useful comments and suggestions.
Group:Caltech Theory
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
Issue or Number:2
Classification Code:PACS: 98.80.Cq
Record Number:CaltechAUTHORS:20130221-090840098
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37041
Deposited By: Tony Diaz
Deposited On:22 Feb 2013 23:47
Last Modified:09 Nov 2021 23:26

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