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Spin entanglement, decoherence and Bohm's EPR paradox

Cavalcanti, E G; Drummond, Peter David; Bachor, Hans; Reid, M D


We 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...[Show more]

CollectionsANU Research Publications
Date published: 2009-10-01
Type: Journal article
Source: Optics Express
DOI: 10.1364/OE.17.018693


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