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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 8 — Aug. 1, 2012
  • pp: 2029–2034

Robust teleportation and multipartite entanglement analyzers via quantum-dot spins in weak-coupling cavity quantum electrodynamics regime

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


JOSA B, Vol. 29, Issue 8, pp. 2029-2034 (2012)
http://dx.doi.org/10.1364/JOSAB.29.002029


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Abstract

We propose a special conditional phase gate (CPG) U^(π/2) between the photon and the electron spin confined in a quantum dot (QD) embedded in a microcavity operating in the weak-coupling regime. This CPG U^(π/2) provides an optical method to manipulate the QDs with photon parity. By using it, we present a scheme for implementing a state teleportation between two remote QD cavities and a scheme for constructing a photonic Bell-state analyzer. Furthermore, a multipartite Greenberger–Horne–Zeilinger state analyzer is also proposed. This multipartite entanglement analyzer can also be used as a multipartite entanglement generator. All these schemes are operated in the weak-coupling regime, so the high fidelities and efficiencies can be maintained even in the case of a bad cavity, and the schemes are accessible with current technologies.

© 2012 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: March 16, 2012
Revised Manuscript: June 5, 2012
Manuscript Accepted: June 6, 2012
Published: July 18, 2012

Citation
Tao Yu, Yan-Qiang Ji, Ai-Dong Zhu, Hong-Fu Wang, and Shou Zhang, "Robust teleportation and multipartite entanglement analyzers via quantum-dot spins in weak-coupling cavity quantum electrodynamics regime," J. Opt. Soc. Am. B 29, 2029-2034 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-8-2029


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