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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. 31, Iss. 5 — May. 1, 2014
  • pp: 994–999

Concentration of multi-photon entanglement with linear optics assisted by quantum nondemolition detection

Yan-Qiang Ji, Zhao Jin, Ai-Dong Zhu, Hong-Fu Wang, and Shou Zhang  »View Author Affiliations


JOSA B, Vol. 31, Issue 5, pp. 994-999 (2014)
http://dx.doi.org/10.1364/JOSAB.31.000994


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Abstract

The entanglement concentration protocols (ECPs) are presented for distilling the maximally entangled state from a known partially entangled n-photon Bell-class and W state, respectively, only resorting to the linear optical elements and quantum nondemolition detector. Different from the traditional parity check with a single photon as an ancilla, we use linear optical elements for changing the photon paths to realize the concentration. The total success probability of the concentration for n-photon entangled states is calculated. The present protocols only require a partially entangled state and do not need any single auxiliary particle. By iterating the ECP repeatedly, the maximal success probability can be increased. Meanwhile, the present protocols are more suitable for the photon system due to the simple operations.

© 2014 Optical Society of America

OCIS Codes
(030.5260) Coherence and statistical optics : Photon counting
(270.5570) Quantum optics : Quantum detectors
(270.5565) Quantum optics : Quantum communications
(270.5585) Quantum optics : Quantum information and processing

ToC Category:
Quantum Optics

History
Original Manuscript: December 6, 2013
Revised Manuscript: February 19, 2014
Manuscript Accepted: March 14, 2014
Published: April 8, 2014

Citation
Yan-Qiang Ji, Zhao Jin, Ai-Dong Zhu, Hong-Fu Wang, and Shou Zhang, "Concentration of multi-photon entanglement with linear optics assisted by quantum nondemolition detection," J. Opt. Soc. Am. B 31, 994-999 (2014)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-31-5-994

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