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dc.contributor.authorCavalcanti, EG
dc.contributor.authorDrummond, PD
dc.contributor.authorBachor, HA
dc.contributor.authorReid, MD
dc.contributor.editorMartijn de Sterke
dc.date.accessioned2017-05-03T15:27:45Z
dc.date.available2017-05-03T15:27:45Z
dc.date.issued2009
dc.date.modified2014-05-15T22:17:29Z
dc.identifier.issn1094-4087
dc.identifier.doi10.1364/OE.17.018693
dc.identifier.urihttp://hdl.handle.net/10072/26817
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.description.peerreviewedYes
dc.description.publicationstatusYes
dc.format.extent163875 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglish
dc.language.isoeng
dc.publisherOptical Society of America
dc.publisher.placeUnited States
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom18693
dc.relation.ispartofpageto18702
dc.relation.ispartofissue21
dc.relation.ispartofjournalOptics Express
dc.relation.ispartofvolume17
dc.rights.retentionY
dc.subject.fieldofresearchQuantum Information, Computation and Communication
dc.subject.fieldofresearchQuantum Optics
dc.subject.fieldofresearchOptical Physics
dc.subject.fieldofresearchElectrical and Electronic Engineering
dc.subject.fieldofresearchCommunications Technologies
dc.subject.fieldofresearchcode020603
dc.subject.fieldofresearchcode020604
dc.subject.fieldofresearchcode0205
dc.subject.fieldofresearchcode0906
dc.subject.fieldofresearchcode1005
dc.titleSpin entanglement, decoherence and Bohm’s EPR paradox
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.rights.copyright© 2009 OSA. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: dx.doi.org/10.1364/OE.17.018693. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
gro.date.issued2009
gro.hasfulltextFull Text
gro.griffith.authorCavalcanti, Eric G.


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