Spin entanglement, decoherence and Bohm's EPR paradox

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dc.contributor.authorCavalcanti, E G
dc.contributor.authorDrummond, Peter David
dc.contributor.authorBachor, Hans
dc.contributor.authorReid, M D
dc.date.accessioned2010-07-21T03:13:13Zen_US
dc.date.accessioned2010-12-20T06:06:03Z
dc.date.available2010-07-21T03:13:13Zen_US
dc.date.available2010-12-20T06:06:03Z
dc.date.issued2009-10-01en_US
dc.date.updated2015-12-08T10:31:00Z
dc.description.abstractWe obtain criteria for entanglement and the EPR paradox for spin-entangled particles and analyse the effects of decoherence caused by absorption and state purity errors. For a two qubit photonic state, entanglement can occur for all transmission efficiencies. In this case, the state preparation purity must be above a threshold value. However, Bohm’s spin EPR paradox can be achieved only above a critical level of loss. We calculate a required efficiency of 58%, which appears achievable with current quantum optical technologies. For a macroscopic number of particles prepared in a correlated state, spin entanglement and the EPR paradox can be demonstrated using our criteria for efficiencies η > 1/3 and η > 2/3 respectively. This indicates a surprising insensitivity to loss decoherence, in a macroscopic system of ultra-cold atoms or photons.
dc.format10 pages
dc.identifier.citationOptics Express 17.21 (2009): 18693-18702
dc.identifier.issn1094-4087en_US
dc.identifier.urihttp://hdl.handle.net/10440/1052en_US
dc.identifier.urihttp://digitalcollections.anu.edu.au/handle/10440/1052
dc.publisherOptical Society of America
dc.rights"OSA will grant the authors permission to deposit the publisher’s pdf from their Optics Express articles into the repository with the proper citation (reference number or journal /volume/page/year citation)." - from email received from Authorized Agent, The Optical Society, 27/05/10
dc.sourceOptics Express
dc.source.urihttp://www.opticsinfobase.org/view_article.cfm?gotourl=http%3A%2F%2Fwww%2Eopticsinfobase%2Eorg%2FDirectPDFAccess%2FF2F94488%2DBDB9%2D137E%2DCEF193B980087FD0%5F186375%2Epdf%3Fda%3D1%26id%3D186375%26seq%3D0%26mobile%3Dno&org=en_US
dc.subjectquantum information and processing
dc.subjectsqueezed states
dc.subjectBose-Einstein condensates
dc.titleSpin entanglement, decoherence and Bohm's EPR paradox
dc.typeJournal article
dcterms.dateAccepted2009-09-19en_US
local.bibliographicCitation.issue21
local.bibliographicCitation.startpage10
local.contributor.affiliationCavalcanti, E G, Griffith University
local.contributor.affiliationDrummond, Peter David, University of Queensland
local.contributor.affiliationBachor, Hans, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationReid, MD, University of Queensland
local.contributor.authoruidE38446en_US
local.contributor.authoruidEx776en_US
local.contributor.authoruidu8203655en_US
local.contributor.authoruidEx778en_US
local.identifier.absfor020601en_US
local.identifier.ariespublicationu4103646xPUB141en_US
local.identifier.citationvolume17
local.identifier.doi10.1364/OE.17.018693
local.identifier.scopusID2-s2.0-70350329488
local.identifier.thomsonID000270766800033
local.identifier.uidSubmittedByu8402810en_US
local.publisher.urlhttp://www.osa.org/en_US
local.type.statusPublished Versionen_US

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