Nanodot-Cavity Electrodynamics and Photon Entanglement

Details Nanodot-Cavity Electrodynamics and Photon Entanglement Nanodot-Cavity Electrodynamics and Photon Entanglement

2003-12-11

arxiv.org/abs/cond-mat/0312272v1

Phys. Rev. Lett. 92, 217402 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages 3 figures

Scientific paper

10.1103/PhysRevLett.92.217402

Quantum electrodynamics of excitons in a cavity is shown to be relevant to quantum operations. We present a theory of an integrable solid-state quantum controlled-phase gate for generating entanglement of two photons using a coupled nanodot-microcavity-fiber structure. A conditional phase shift of $O(\pi/10)$ is calculated to be the consequence of the giant optical nonlinearity keyed by the excitons in the cavities. Structural design and active control, such as electromagnetic induced transparency and pulse shaping, optimize the quantum efficiency of the gate operation.

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