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Phase-Conjugate-State Pairs in Entangled States

Phase-Conjugate-State Pairs in Entangled States We consider the probability that a bipartite quantum state contains phase-conjugate-state (PCS) pairs and/or identical-state pairs as signatures of quantum entanglement. While the fraction of the PCS pairs directly indicates the property of a maximally entangled state, the fraction of the identical-state pairs negatively determines antisymmetric entangled states such as singlet states. We also consider the physical limits of these probabilities. This imposes fundamental restrictions on the pair appearance of the states with respect to the local access of the physical system. For continuous-variable system, we investigate similar relations by employing the pairs of phase-conjugate coherent states. We also address the role of the PCS pairs for quantum teleportation in both discrete-variable and continuous-variable systems. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Atomic, Molecular, and Optical Physics Hindawi Publishing Corporation

Phase-Conjugate-State Pairs in Entangled States

Journal of Atomic, Molecular, and Optical Physics , Volume 2012 (2012) – Nov 8, 2012

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Publisher
Hindawi Publishing Corporation
Copyright
Copyright © 2012 Ryo Namiki.
ISSN
1687-9228
eISSN
1687-9236
Publisher site
See Article on Publisher Site

Abstract

We consider the probability that a bipartite quantum state contains phase-conjugate-state (PCS) pairs and/or identical-state pairs as signatures of quantum entanglement. While the fraction of the PCS pairs directly indicates the property of a maximally entangled state, the fraction of the identical-state pairs negatively determines antisymmetric entangled states such as singlet states. We also consider the physical limits of these probabilities. This imposes fundamental restrictions on the pair appearance of the states with respect to the local access of the physical system. For continuous-variable system, we investigate similar relations by employing the pairs of phase-conjugate coherent states. We also address the role of the PCS pairs for quantum teleportation in both discrete-variable and continuous-variable systems.

Journal

Journal of Atomic, Molecular, and Optical PhysicsHindawi Publishing Corporation

Published: Nov 8, 2012

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