## Efficient W-state entanglement concentration using quantum-dot and optical microcavities |

JOSA B, Vol. 30, Issue 3, pp. 678-686 (2013)

http://dx.doi.org/10.1364/JOSAB.30.000678

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### Abstract

We present an entanglement concentration protocol (ECP) for the less-entangled W-state with quantum-dot and microcavity coupled systems. The present protocol uses quantum nondemolition measurement on the spin parity to construct the hybrid parity check gate. Different from other ECPs, the less-entangled W-state with quantum-dot and microcavity coupled systems can be concentrated with the help of some single photons. The most significant advantage is that during the whole ECP, we do not destroy the W-state and only consume some local single photons. The whole protocol can be repeated to obtain a higher success probability. It may be useful in current quantum information processing.

© 2013 Optical Society of America

**OCIS Codes**

(270.0270) Quantum optics : Quantum optics

(270.5580) Quantum optics : Quantum electrodynamics

(270.5585) Quantum optics : Quantum information and processing

**ToC Category:**

Quantum Optics

**History**

Original Manuscript: November 6, 2012

Revised Manuscript: December 17, 2012

Manuscript Accepted: January 15, 2013

Published: February 21, 2013

**Citation**

Yu-Bo Sheng and Lan Zhou, "Efficient W-state entanglement concentration using quantum-dot and optical microcavities," J. Opt. Soc. Am. B **30**, 678-686 (2013)

http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-30-3-678

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