Performance of a quantum teleportation protocol based on collective spontaneous emission
- Department of Physics, Miami University, Oxford, Ohio 45056 (United States)
Recently a conditional quantum teleportation protocol has been proposed by Chen et al. [New J. Phys. 7, 172 (2005)], which is based on the collective spontaneous emission of a photon from a pair of quantum dots. We formulate a similar protocol for 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 overall success probability. We consider a strategy employing spatially resolved photodetection of the emitted photon in order to distinguish superradiant from subradiant emission on the basis of a single detected photon. We find that 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 2/3 for arbitrary atomic separations with the ultimate limit of performance coming from the spatial resolution of the detectors.
- OSTI ID:
- 21176020
- Journal Information:
- Journal of the Optical Society of America. Part B, Optical Physics, Vol. 26, Issue 3; Other Information: DOI: 10.1364/JOSAB.26.000541; (c) 2009 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA); ISSN 0740-3224
- Country of Publication:
- United States
- Language:
- English
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