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Intrinsic decoherence mechanisms in the microcavity polariton condensate
The fundamental mechanisms which control the phase coherence of the polariton Bose-Einstein condensate (BEC) are determined. It is shown that the combination of number fluctuations and interactions leads to decoherence with a characteristic Gaussian decay of the first-order correlation function. This line shape, and the long decay times ( 150 ps) of both first- and second-order correlation functions, are explained quantitatively by a quantum-optical model which takes into account interactions, fluctuations, and gain and loss in the system. Interaction limited coherence times of this type have been predicted for atomic BECs, but are yet to be observed experimentally.
Keyword(s): Condensed matter physics; Bose-Einstein condensate (BEC)
Publication Date:
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: Trinity College Dublin
Citation(s): Love, APD, Krizhanovskii, DN, Whittaker, DM, Bouchekioua, R, Sanvitto, D, Al Rizeiqi, S, Bradley, R, Skolnick, MS, Eastham, PR, Andre, R, Dang, LS, Intrinsic decoherence mechanisms in the microcavity polariton condensate, Physical Review Letters, 101, 2008, 067404 -
Publisher(s): American Physical Society
First Indexed: 2014-05-13 05:12:16 Last Updated: 2017-04-26 08:35:02