Evolution of entanglement between distinguishable light states

Stevenson, R. Mark, Hudson, Andrew J., Bennett, Anthony ORCID: https://orcid.org/0000-0002-5386-3710, 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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Abstract

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:	03 Nov 2022 10:04
URI:	https://orca.cardiff.ac.uk/id/eprint/106823

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