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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Grover Swartzlander
  • Vol. 30, Iss. 4 — Apr. 1, 2013
  • pp: 1069–1076

Entanglement concentration for arbitrary unknown less-entangled three-photon W states with linear optics

Tie-Jun Wang and Gui Lu Long  »View Author Affiliations


JOSA B, Vol. 30, Issue 4, pp. 1069-1076 (2013)
http://dx.doi.org/10.1364/JOSAB.30.001069


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Abstract

We present two three-photon entanglement concentration protocols (ECPs) for an arbitrary unknown less-entangled W -class state, resorting to linear optical elements. In our normal ECP, the three parties can obtain a three-photon system in a standard W state probabilistically, similar to the Schmidt projection method. In our improved ECP, the parties obtain not only some higher-fidelity partially entangled three-photon systems but also some entangled two-photon systems in each round of concentration with two copies of three-photon systems. It is interesting to show that the three-photon and two-photon systems kept after a round of concentration have the same parameters. The parties can obtain some three-photon systems in a standard W state with a far higher success probability than the normal ECP, by exploiting the three-photon and two-photon systems with the same parameters as the resource for the next round of concentration. Both of these ECPs may have good applications in quantum communication in the future.

© 2013 Optical Society of America

OCIS Codes
(270.0270) Quantum optics : Quantum optics
(270.5585) Quantum optics : Quantum information and processing

ToC Category:
Quantum Optics

History
Original Manuscript: January 8, 2013
Revised Manuscript: February 5, 2013
Manuscript Accepted: February 13, 2013
Published: March 29, 2013

Citation
Tie-Jun Wang and Gui Lu Long, "Entanglement concentration for arbitrary unknown less-entangled three-photon W states with linear optics," J. Opt. Soc. Am. B 30, 1069-1076 (2013)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-30-4-1069

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