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Phys. Rev. A 62, 032304 (2000) [12 pages]

Physical implementation for entanglement purification of Gaussian continuous-variable quantum states

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Lu-Ming Duan1,2 *, G. Giedke1, J. I. Cirac1, and P. Zoller1
1Institut für Theoretische Physik, Universität Innsbruck, A-6020 Innsbruck, Austria
2Department of Physics, University of Science and Technology of China, Hefei 230026, China

Received 6 March 2000; published 14 August 2000

We give a detailed description of the entanglement purification protocol which generates maximally entangled states with high efficiencies from realistic Gaussian continuous variable entangled states. The physical implementation of this protocol is extensively analyzed using high finesse cavities and cavity enhanced cross Kerr nonlinearities. In particular, we take into account many imperfections in the experimental scheme and calculate their influences. Quantitative requirements are given for the relevant experimental parameters.


©2000 The American Physical Society

URL: http://link.aps.org/abstract/PRA/v62/e032304
DOI: 10.1103/PhysRevA.62.032304
PACS: 03.67.Hk, 42.50.-p, 03.65.Bz

* Email address: luming.duan@uibk.ac.at

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