Time-evolving entanglement and violation of bell inequalities using a quantum dot photon-pair emitter

Stevenson, R. M. and Young, R. J. and Hudson, A. J. and Bennett, A. J. and Nicoll, C. A. and Ritchie, D. A. and Shields, A. J. (2009) Time-evolving entanglement and violation of bell inequalities using a quantum dot photon-pair emitter. In: The European Conference on Lasers and Electro-Optics, CLEO_Europe 2009. Optical Society of America (OSA), DEU. ISBN 9781424440801

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Abstract

Polarization-entangled photons provide intriguing insight into the fundamentals of quantum physics, and are vital technology for large scale quantum computing with linear optics, and extending the distance over which a quantum key can be shared. However, those entangled photon sources that have been implemented so far are typically probed using time-averaged measurements, thus obscuring any quantum correlations that evolve over the lifetime of the state. Here we measure the evolution of quantum correlations over the lifetime of a photon pair state, generated by an optically excited quantum dot at ~10K. Time-dependent oscillations of the entanglement fidelity are observed, and attributed to the spin-dependent phase acquired in the intermediate, non-degenerate, exciton-photon state.

Item Type:
Contribution in Book/Report/Proceedings
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3107
Subjects:
ID Code:
128536
Deposited By:
Deposited On:
29 Oct 2018 11:34
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 10:52