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Coherence properties of the microcavity polariton condensate

Whittaker, D.M. and Eastham, P.R. (2009) Coherence properties of the microcavity polariton condensate. EPL, 87 (2). Art. no.27002. ISSN 0295-5075


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A theoretical model is presented which explains the dominant decoherence process in a microcavity polariton condensate. The mechanism which is invoked is the effect of self-phase modulation, whereby interactions transform polariton number fluctuations into random energy variations. The model shows that the phase coherence decay, g((1))(tau), has a Kubo form, which can be Gaussian or exponential, depending on whether the number fluctuations are slow or fast. This fluctuation rate also determines the decay time of the intensity correlation function, g((2))(tau), so it can be directly determined experimentally. The model explains recent experimental measurements of a relatively fast Gaussian decay for g((1))(tau), but also predicts a regime, further above threshold, where the decay is much slower. Copyright (C) EPLA, 2009

Item Type: Article
Copyright, Publisher and Additional Information: © 2009 EPL, Published by EDP Sciences. Reproduced in accordance with the publisher's self-archiving policy
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield)
Depositing User: Miss Anthea Tucker
Date Deposited: 01 Oct 2009 09:12
Last Modified: 08 Jun 2014 11:00
Published Version: http://dx.doi.org/10.1209/0295-5075/87/27002
Status: Published
Publisher: EDP Sciences
Refereed: Yes
Identification Number: 10.1209/0295-5075/87/27002
URI: http://eprints.whiterose.ac.uk/id/eprint/9807

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