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Evolution of entanglement between distinguishable light states

Stevenson, R. Mark, Hudson, Andrew J., Bennett, Anthony, Young, Robert J., Nicoll, Christine A., Ritchie, David A. and Shields, Andrew J. 2008. Evolution of entanglement between distinguishable light states. Physical Review Letters 101 (17) , 170501. 10.1103/PhysRevLett.101.170501

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We investigate the evolution of quantum correlations over the lifetime of a multiphoton state. Measurements reveal time-dependent oscillations of the entanglement fidelity for photon pairs created by a single semiconductor quantum dot. The oscillations are attributed to the phase acquired in the intermediate, nondegenerate, exciton-photon state and are consistent with simulations. We conclude that emission of photon pairs by a typical quantum dot with finite polarization splitting is in fact entangled in a time-evolving state, and not classically correlated as previously regarded.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: American Physical Society
ISSN: 0031-9007
Last Modified: 27 Nov 2017 16:57

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