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Experimental violation of a Bell-like inequality with optical vortex beams

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dc.contributor.authorStoklasa, B.
dc.contributor.authorMotka, L.
dc.contributor.authorŘeháček, J.
dc.contributor.authorHradil, Z.
dc.contributor.authorSánchez Soto, Luis Lorenzo
dc.contributor.authorAgarwal, Girish S.
dc.date.accessioned2023-06-18T06:49:38Z
dc.date.available2023-06-18T06:49:38Z
dc.date.issued2015-11
dc.description©2015 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. We acknowledge illuminating discussions with Gerd Leuchs, Elisabeth Giacobino, and Andrea Aiello. This work was supported by the Grant Agency of the Czech Republic (Grant 15-031945), the European Social Fund and the State Budget of the Czech Republic POSTUP II (Grant CZ.1.07/2.3.00/30.0041), the IGA of Palacky University (Grant PrF-2015-002), and the UCM-BSCH Program (Grant GR3/14).
dc.description.abstractOptical beams with topological singularities have a Schmidt decomposition. Hence, they display features typically associated with bipartite quantum systems; in particular, these classical beams can exhibit entanglement. This classical entanglement can be quantified by a Bell inequality formulated in terms of Wigner functions. We experimentally demonstrate the violation of this inequality for Laguerre-Gauss (LG) beams and confirm that the violation increases with increasing orbital angular momentum. Our experimental scheme, which is designed to give directly the parity of the Wigner function, yields negativity at the origin for LG_10 beams, whereas for LG_20 we always get a positive value.
dc.description.departmentDepto. de Óptica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipGrant Agency of the Czech Republic
dc.description.sponsorshipState Budget of the Czech Republic POSTUP II
dc.description.sponsorshipIGA of Palacky University
dc.description.sponsorshipUCM-BSCH Program
dc.description.sponsorshipBanco Santander Central Hispano (BSCH)
dc.description.sponsorshipUniversidad Complutense de Madrid (UCM)
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/35539
dc.identifier.doi10.1088/1367-2630/17/11/113046
dc.identifier.issn1367-2630
dc.identifier.officialurlhttp://dx.doi.org/10.1088/1367-2630/17/11/113046
dc.identifier.relatedurlhttp://iopscience.iop.org/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/24324
dc.journal.titleNew journal of physics
dc.language.isoeng
dc.publisherIOP Publishing
dc.relation.projectID15-031945
dc.relation.projectIDCZ.1.07/2.3.00/30.0041
dc.relation.projectIDPrF-2015-002
dc.relation.projectIDGR3/14
dc.rightsAtribución 3.0 España
dc.rights.accessRightsopen access
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/es/
dc.subject.cdu535
dc.subject.keywordOrbital angular-momentum
dc.subject.keywordQuantum entanglement
dc.subject.keywordWigner function
dc.subject.keywordNonlocality
dc.subject.keywordCoherence
dc.subject.keywordStates
dc.subject.keywordRadiometry
dc.subject.keywordEntropy
dc.subject.keywordFields
dc.subject.keywordSpace
dc.subject.ucmÓptica (Física)
dc.subject.unesco2209.19 Óptica Física
dc.titleExperimental violation of a Bell-like inequality with optical vortex beams
dc.typejournal article
dc.volume.number17
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