Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
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TY - GEN
T1 - Time-evolving entanglement and violation of bell inequalities using a quantum dot photon-pair emitter
AU - Stevenson, R. M.
AU - Young, R. J.
AU - Hudson, A. J.
AU - Bennett, A. J.
AU - Nicoll, C. A.
AU - Ritchie, D. A.
AU - Shields, A. J.
PY - 2009/1/1
Y1 - 2009/1/1
N2 - 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.
AB - 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.
U2 - 10.1109/CLEOE-EQEC.2009.5194549
DO - 10.1109/CLEOE-EQEC.2009.5194549
M3 - Conference contribution/Paper
AN - SCOPUS:84898033343
SN - 9781424440801
BT - The European Conference on Lasers and Electro-Optics, CLEO_Europe 2009
PB - Optical Society of America (OSA)
T2 - The European Conference on Lasers and Electro-Optics, CLEO_Europe 2009
Y2 - 14 June 2009 through 19 June 2009
ER -