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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3342
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dc.contributor.authorChandrashekar, C.M.-
dc.contributor.authorSrikanth, R.-
dc.contributor.authorBanerjee, Subhashish-
dc.date.accessioned2007-10-05T10:02:52Z-
dc.date.available2007-10-05T10:02:52Z-
dc.date.issued2007-08-
dc.identifier.citationPhysical Review A, 2007, Vol. 76, 022316en
dc.identifier.issnE-ISSN: 1094-1622-
dc.identifier.issnP-ISSN(s): 0556-2791; 1050-2947-
dc.identifier.urihttp://hdl.handle.net/2289/3342-
dc.descriptionOpen Accessen
dc.description.abstractWe study some discrete symmetries of unbiased (Hadamard) and biased quantum walk on a line, which are shown to hold even when the quantum walker is subjected to environmental effects. The noise models considered in order to account for these effects are the phase flip, bit flip, and generalized amplitude damping channels. The numerical solutions are obtained by evolving the density matrix, but the persistence of the symmetries in the presence of noise is proved using the quantum trajectories approach. We also briefly extend these studies to quantum walk on a cycle. These investigations can be relevant to the implementation of quantum walks in various known physical systems. We discuss the implementation in the case of NMR quantum information processor and ultracold atoms.en
dc.format.extent322655 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.urihttp://arxiv.org/abs/quant-ph/0607188en
dc.relation.urihttp://link.aps.org/abstract/PRA/v76/e022316en
dc.rights2007 American Physical Societyen
dc.titleSymmetries and noise in quantum walken
dc.typeArticleen
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Research Papers (TP)

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