Spectral effects in quantum teleportation

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Travis S. Humble and Warren P. Grice
Center for Engineering Science Advanced Research, Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6016, USA

Received 14 November 2006; published 8 February 2007

Weuse a multimode description of polarization-encoded qubits to analyze thequantum teleportation protocol. Specifically, we investigate how the teleportation fidelitydepends on the spectral correlations inherent to polarization-entangled photons generatedby type-II spontaneous parametric down conversion. We find that themaximal obtainable fidelity depends on the spectral entanglement carried bythe joint probability amplitude, a result which we quantify forthe case of a joint spectrum approximated by a correlatedGaussian function. We contrast these results with a similar analysisof the visibility obtained in a polarization-correlation experiment.

URL:	http://link.aps.org/doi/10.1103/PhysRevA.75.022307
DOI:	10.1103/PhysRevA.75.022307
PACS:	03.67.Mn; 42.50.Dv 03.67.Mn Quantum entanglement production, characterization, and manipulation 42.50.Dv Nonclassical states of the electromagnetic field, including entangled photon states; quantum state engineering and measurements YEAR: 2007
KEYWORDS:	teleportation, quantum computing, quantum optics, quantum entanglement, protocols, Gaussian distribution

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