Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Evolution of Entanglement Between Distinguishable Light States
AU - Stevenson, R. Mark
AU - Hudson, Andrew J.
AU - Bennett, Anthony J.
AU - Young, Robert J.
AU - Nicoll, Christine A.
AU - Ritchie, David A.
AU - Shields, Andrew J.
PY - 2008/10/24
Y1 - 2008/10/24
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=55049099259&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.101.170501
DO - 10.1103/PhysRevLett.101.170501
M3 - Journal article
VL - 101
SP - -
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 17
M1 - 170501
ER -