Entanglement of Identical Particles and Reference Phase Uncertainty.

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Title Entanglement of Identical Particles and Reference Phase Uncertainty.
Author Vaccaro, J. A.; Anselmi, F.; Wiseman, Howard Mark
Journal Name International Journal of Quantum Information
Year Published 2003
Place of publication Singapore
Publisher World Scientific Publishing Co. Pte. Ltd.
Abstract We have recently introduced a measure of the bipartite entanglement of identical particles, EP, based on the principle that entanglement should be accessible for use as a resource in quantum information processing. We show here that particle entanglement is limited by the lack of a reference phase shared by the two parties, and that the entanglement is constrained to reference-phase invariant subspaces. The super-additivity of EP results from the fact that this constraint is weaker for combined systems. A shared reference phase can only be established by transferring particles between the parties, that is, with additional nonlocal resources. We show how this nonlocal operation can increase the particle entanglement.
Peer Reviewed Yes
Published Yes
Publisher URI http://www.worldscinet.com/ijqi/ijqi.shtml
Alternative URI http://dx.doi.org/10.1142/S0219749903000346
Copyright Statement Electronic version of an article published as [International Journal of Quantum Information, 1, 4, 2003, 427-441] [http://dx.doi.org/10.1142/S0219749903000346] [copyright World Scientific Publishing Company] [http://www.worldscinet.com/ijqi/ijqi.shtml] For journal papers, please refer to our site at http://www.worldscinet.com/authors/authorrights.shtml
Volume 1
Issue Number 4
Page from 427
Page to 441
ISSN 0219-7499
Date Accessioned 2004-03-29
Language en_AU
Research Centre Centre for Quantum Dynamics
Faculty Faculty of Science
Subject PRE2009-Theoretical Physics
URI http://hdl.handle.net/10072/6309
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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