Efficient entanglement concentration for partially entangled cluster states with weak cross-Kerr nonlinearity

Efficient entanglement concentration for partially entangled cluster states with weak cross-Kerr... In this paper, we propose an optimal entanglement concentration protocol (ECP) for partially entangled cluster states with the help of the weak cross-Kerr nonlinearity. We can obtain the maximally entangled cluster states assisted with the projection measurements on the additional photons. The protocol is based on optical elements, single polarization photons, cross-Kerr nonlinearity, and the conventional photon detectors, which are feasible with existing experimental technology. Numerical simulation demonstrates that by iterating the entanglement concentration process $$n=m=6$$ n = m = 6 times, the ECP has the approximate maximal success probability 100 %. Moreover, the present protocol is also suitable for partially entangled $$4N$$ 4 N -photon cluster states concentration. All these advantages make this protocol more efficient and more convenient than others in the applications in quantum communication. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Efficient entanglement concentration for partially entangled cluster states with weak cross-Kerr nonlinearity

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Publisher
Springer US
Copyright
Copyright © 2015 by Springer Science+Business Media New York
Subject
Physics; Quantum Information Technology, Spintronics; Quantum Computing; Data Structures, Cryptology and Information Theory; Quantum Physics; Mathematical Physics
ISSN
1570-0755
eISSN
1573-1332
D.O.I.
10.1007/s11128-015-1029-6
Publisher site
See Article on Publisher Site

Abstract

In this paper, we propose an optimal entanglement concentration protocol (ECP) for partially entangled cluster states with the help of the weak cross-Kerr nonlinearity. We can obtain the maximally entangled cluster states assisted with the projection measurements on the additional photons. The protocol is based on optical elements, single polarization photons, cross-Kerr nonlinearity, and the conventional photon detectors, which are feasible with existing experimental technology. Numerical simulation demonstrates that by iterating the entanglement concentration process $$n=m=6$$ n = m = 6 times, the ECP has the approximate maximal success probability 100 %. Moreover, the present protocol is also suitable for partially entangled $$4N$$ 4 N -photon cluster states concentration. All these advantages make this protocol more efficient and more convenient than others in the applications in quantum communication.

Journal

Quantum Information ProcessingSpringer Journals

Published: May 21, 2015

References

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