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dc.contributor.authorBeduini, Federica A.
dc.contributor.authorZielińska, Joanna Ada
dc.contributor.authorLucivero, Vito G.
dc.contributor.authorIcaza Astiz, Yannick A. de
dc.contributor.authorMitchell, Morgan W.
dc.contributor.otherUniversitat Politècnica de Catalunya. Institut de Ciències Fotòniques
dc.date.accessioned2015-03-30T14:04:18Z
dc.date.available2015-03-30T14:04:18Z
dc.date.issued2015-03-27
dc.identifier.citationBeduini, Federica A. [et al.]. Macroscopic Quantum State Analyzed Particle by Particle. "Physical Review Letters", 27 Març 2015, vol. 114, núm. 120402.
dc.identifier.issn0031-9007
dc.identifier.urihttp://hdl.handle.net/2117/27115
dc.description.abstractMacroscopic quantum phenomena, e.g., superconductivity and squeezing, are believed to result from entanglement of macroscopic numbers of particles. We report the first direct study of this kind of entanglement: we use discrete quantum tomography to reconstruct the joint quantum state of photon pairs extracted from polarization-squeezed light. Our observations confirm several predictions from spinsqueezing theory [Beduini et al., Phys. Rev. Lett. 111, 143601 (2013)], including strong entanglement and entanglement of all photon pairs within the squeezing coherence time. This photon-by-photon analysis may give insight into other macroscopic many-body systems, e.g., photon Bose-Einstein condensates.
dc.format.extent4
dc.language.isoeng
dc.publisherACS Publications
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica::Fotònica
dc.subject.lcshQuantum theory
dc.subject.otherQuantum mechanics
dc.titleMacroscopic Quantum State Analyzed Particle by Particle
dc.typeArticle
dc.subject.lemacQuàntums, Teoria dels
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://journals.aps.org/prl/abstract/10.1103/PhysRevLett.114.120402
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/FP7/280169/EU/Atomic Quantum Metrology/AQUMET
local.citation.authorBeduini, Federica A.; Zielińska, Joanna A.; Lucivero, Vito G.; Icaza Astiz, Yannick A. de; Mitchell, Morgan W.
local.citation.publicationNamePhysical Review Letters
local.citation.volume114
local.citation.number120402


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