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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6717
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dc.contributor.authorSingh, Ashutosh-
dc.contributor.authorPradyumna, Siva-
dc.contributor.authorRau, A.R.P.-
dc.contributor.authorSinha, Urbasi-
dc.date.accessioned2017-09-04T11:15:36Z-
dc.date.available2017-09-04T11:15:36Z-
dc.date.issued2017-03-
dc.identifier.citationJournal of the Optical Society of America B, 2017, Vol. 34, p681en_US
dc.identifier.issn1520-8540 (online)-
dc.identifier.issn0740-3224-
dc.identifier.urihttp://hdl.handle.net/2289/6717-
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en_US
dc.description.abstractThe unavoidable and irreversible interaction between an entangled quantum system and its environment causes decoherence of the individual qubits as well as degradation of the entanglement between them. Entanglement sudden death (ESD) is the phenomenon wherein disentanglement happens in finite time even when individual qubits decohere only asymptotically in time due to noise. Prolonging the entanglement is essential for the practical realization of entanglement-based quantum information and computation protocols. For this purpose, the local NOT operation in the computational basis on one or both qubits has been proposed. Here, we formulate an all-optical experimental setup involving such NOT operations that can hasten, delay, or completely avert ESD, all depending on when it is applied during the process of decoherence. Analytical expressions for these are derived in terms of parameters of the initial state’s density matrix, whether for pure or mixed entangled states. After a discussion of the schematics of the experiment, the problem is theoretically analyzed, and simulation results of such manipulations of ESD are presented.en_US
dc.language.isoenen_US
dc.publisherOptical Society of Americaen_US
dc.relation.urihttp://arxiv.org/abs/1703.01159en_US
dc.relation.urihttp://dx.doi.org/10.1364/JOSAB.34.000681en_US
dc.rights2017 Optical Society of Americaen_US
dc.subjectQuantum information and processingen_US
dc.titleManipulation of entanglement sudden death in an all-optical setupen_US
dc.typeArticleen_US
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