Entangling single photons on a beamsplitter

Details Entangling single photons on a beamsplitter Entangling single photons on a beamsplitter

2008-01-10

arxiv.org/abs/0801.1595v1

Physics

Quantum Physics

Accepted EPJD

Scientific paper

10.1140/epjd/e2008-00017-3

We report on a scheme for the creation of time-bin entangled states out of two subsequent single photons. Both photons arrive on the same input port of a beamsplitter and the situation in which the photons leave the beamsplitter on different output ports is post-selected. We derive a full quantum mechanical analysis of such time-bin entanglement for emitters subject to uncorrelated dephasing processes and apply this model to sequential single photons emerging from a single semiconductor quantum dot. Our results indicate that the visibility of entanglement is degraded by decoherence effects in the quantum dot, but can be restored by use of CQED effects, namely the Purcell effect.

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