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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3799
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dc.contributor.authorSrikanth, R.-
dc.contributor.authorBanerjee, Subhashish-
dc.date.accessioned2009-07-22T08:06:49Z-
dc.date.available2009-07-22T08:06:49Z-
dc.date.issued2009-02-
dc.identifier.citationEuropean Physical Journal D, 2009, Vol.53, p217en
dc.identifier.issnE-ISSN: 1434-6079-
dc.identifier.issnP-ISSN: 1434-6060-
dc.identifier.urihttp://hdl.handle.net/2289/3799-
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en
dc.description.abstractWe develop an information theoretic interpretation of the number-phase complementarity in atomic systems, where phase is treated as a continuous positive operator valued measure (POVM). The relevant uncertainty principle is obtained as an upper bound on a sum of knowledge of these two observables for the case of two-level systems. A tighter bound characterizing the uncertainty relation is obtained numerically in terms of a weighted knowledge sum involving these variables. We point out that complementarity in these systems departs from mutual unbiasededness in two significant ways: first, the maximum knowledge of a POVM variable is less than log (dimension) bits; second, surprisingly, for higher dimensional systems, the unbiasedness may not be mutual but unidirectional in that phase remains unbiased with respect to number states, but not vice versa. Finally, we study the effect of non-dissipative and dissipative noise on these complementary variables for a single-qubit system.en
dc.language.isoenen
dc.publisherEDP Sciences /Springeren
dc.relation.urihttp://arxiv.org/abs/0711.0875en
dc.relation.urihttp://dx.doi.org/10.1140/epjd/e2009-00049-1en
dc.relation.urihttp://adsabs.harvard.edu/abs/2009EPJD...53..217Sen
dc.rights2009 Springeren
dc.titleComplementarity in atomic (finite-level quantum) systems: an information-theoretic approachen
dc.typeArticleen
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