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Projective measurements under qubit quantum channels

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dc.abstract.enThe action of qubit channels on projective measurements on a qubit state is used to establish an equivalence between channels and properties of generalized measurements characterized by bias and sharpness parameters. This can be interpreted as shifting the description of measurement dynamics from the Schrodinger to the Heisenberg picture. In particular, unital quantum channels are shown to induce unbiased measurements. The Markovian channels are found to be equivalent to measurements for which sharpness is a monotonically decreasing function of time. These results are illustrated by considering various noise channels. The effect of bias and sharpness parameters on various quantum correlations and on the energy cost of measurements is discussed. Further, we illustrate the quantum circuit implementation of the two element positive operator-valued measures characterized by the bias and sharpness parameters.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorNaikoo, Javid
dc.contributor.authorBanerjee, Subhashish
dc.contributor.authorGhosh, Sibasish
dc.contributor.authorPan, A. K.
dc.date.accessioned2024-01-25T18:08:46Z
dc.date.available2024-01-25T18:08:46Z
dc.date.issued2021
dc.description.financePublikacja bezkosztowa
dc.description.volume104
dc.identifier.doi10.1103/PHYSREVA.104.042608
dc.identifier.issn2469-9926
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/117205
dc.identifier.weblinkhttps://journals.aps.org/pra/pdf/10.1103/PhysRevA.104.042608
dc.languageeng
dc.pbn.affiliationphysical sciences
dc.relation.ispartofPhysical Review A
dc.relation.pages042608 (1-9)
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.titleProjective measurements under qubit quantum channels
dc.typeJournalArticle
dspace.entity.typePublication