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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 0556-2821. http://resolver.caltech.edu/CaltechAUTHORS:20130221-090840098

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Abstract

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
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevD.87.023518 DOIUNSPECIFIED
http://link.aps.org/doi/10.1103/PhysRevD.87.023518PublisherUNSPECIFIED
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
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Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
Classification Code:PACS: 98.80.Cq
Record Number:CaltechAUTHORS:20130221-090840098
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130221-090840098
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37041
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:22 Feb 2013 23:47
Last Modified:08 Mar 2013 22:20

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