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Fidelity of quantum teleportation based on spatially and temporally resolved spontaneous emission

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Abstract

We analyze a quantum teleportation protocol based on spatially and temporally resolved direct photodetection of the collective emission from a pair of atoms, one of which is entangled with a single mode of an optical cavity. We focus on the performance of the protocol as characterized by the fidelity of the teleported state and the success probability. We find that the fidelity approaches unity as the spacing of the atoms becomes much smaller than the emission wavelength with a success probability of 0.25. The fidelity remains above the classical limit of 23 for all atomic spacings with the ultimate limit of performance coming from the spatial resolution of the photodetection.

© 2010 Optical Society of America

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