Generalized coherent states and extremal positive operator valued measures

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dc.contributor.authorHeinosaari T
dc.contributor.authorPellonpaa JP
dc.contributor.organizationfi=fysiikan ja tähtitieteen laitos|en=Department of Physics and Astronomy|
dc.contributor.organizationfi=teoreettisen fysiikan laboratorio|en=Laboratory of Theoretical Physics|
dc.contributor.organization-code1.2.246.10.2458963.20.14547848953
dc.contributor.organization-code1.2.246.10.2458963.20.55477946762
dc.converis.publication-id3147664
dc.converis.urlhttps://research.utu.fi/converis/portal/Publication/3147664
dc.date.accessioned2022-10-27T11:57:58Z
dc.date.available2022-10-27T11:57:58Z
dc.description.abstractWe present a correspondence between positive operator valued measures (POVMs) and sets of generalized coherent states. POVMs describe quantum observables and, similar to quantum states, quantum observables can also be mixed. We show how the formalism of generalized coherent states leads to a useful characterization of extremal POVMs. We prove that covariant phase-space observables related to squeezed states are extremal, while those related to number states are not extremal.
dc.identifier.jour-issn1751-8113
dc.identifier.olddbid173164
dc.identifier.oldhandle10024/156258
dc.identifier.urihttps://www.utupub.fi/handle/11111/30974
dc.identifier.urnURN:NBN:fi-fe2021042715083
dc.language.isoen
dc.okm.affiliatedauthorHeinosaari, Teiko
dc.okm.affiliatedauthorPellonpää, Juha-Pekka
dc.okm.discipline114 Physical sciencesen_GB
dc.okm.discipline114 Fysiikkafi_FI
dc.okm.internationalcopublicationnot an international co-publication
dc.okm.internationalityInternational publication
dc.okm.typeA1 ScientificArticle
dc.publisherIOP PUBLISHING LTD
dc.publisher.countryUnited Kingdomen_GB
dc.publisher.countryBritanniafi_FI
dc.publisher.country-codeGB
dc.relation.articlenumberARTN 244019
dc.relation.doi10.1088/1751-8113/45/24/244019
dc.relation.ispartofjournalJournal of Physics A: Mathematical and Theoretical
dc.relation.issue24
dc.relation.volume45
dc.source.identifierhttps://www.utupub.fi/handle/10024/156258
dc.titleGeneralized coherent states and extremal positive operator valued measures
dc.year.issued2012

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