Entangled Photons from Small Quantum Dots

Details Entangled Photons from Small Quantum Dots Entangled Photons from Small Quantum Dots

2002-10-24

arxiv.org/abs/quant-ph/0210170v1

Physics

Quantum Physics

10 pages, 8 figures

Scientific paper

10.1103/PhysRevA.68.053805

We discuss level schemes of small quantum-dot turnstiles and their applicability in the production of entanglement in two-photon emission. Due to the large energy splitting of the single-electron levels, only one single electron level and one single hole level can be made resonant with the levels in the conduction band and valence band. This results in a model with nine distinct levels, which are split by the Coulomb interactions. We show that the optical selection rules are different for flat and tall cylindrically symmetric dots, and how this affects the quality of the entanglement generated in the decay of the biexciton state. The effect of charge carrier tunneling and of a resonant cavity is included in the model.

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