Macroscopic Quantum State Analyzed Particle by Particle

Macroscopic 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...

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Authors: Beduini, Federica A., Zielińska, Joanna Ada, Lucivero, Vito G., Icaza Astiz, Yannick A. de, Mitchell, Morgan W.
Format: article
Publication Date:2015
Country:España
Institution:Universitat Politècnica de Catalunya (UPC)
Repository:UPCommons. Portal del coneixement obert de la UPC
Language:English
OAI Identifier:oai:upcommons.upc.edu:2117/27115
Online Access:https://hdl.handle.net/2117/27115
Access Level:Open access
Keyword:Quantum theory
Quantum mechanics
Quàntums, Teoria dels
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica::Fotònica
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network_acronym_str ES
network_name_str España
repository_id_str
spelling Macroscopic Quantum State Analyzed Particle by ParticleBeduini, Federica A.Zielińska, Joanna AdaLucivero, Vito G.Icaza Astiz, Yannick A. deMitchell, Morgan W.Quantum theoryQuantum mechanicsQuàntums, Teoria delsÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica::FotònicaMacroscopic 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.Peer ReviewedACS Publications20152015-03-2720152015-03-30journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/27115reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)InglésengEuropean Commission http://dx.doi.org/10.13039/100011102 Seventh Framework Programme 280169 Atomic Quantum Metrologyopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/271152026-05-27T15:37:01Z
dc.title.none.fl_str_mv Macroscopic Quantum State Analyzed Particle by Particle
title Macroscopic Quantum State Analyzed Particle by Particle
spellingShingle Macroscopic Quantum State Analyzed Particle by Particle
Beduini, Federica A.
Quantum theory
Quantum mechanics
Quàntums, Teoria dels
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica::Fotònica
title_short Macroscopic Quantum State Analyzed Particle by Particle
title_full Macroscopic Quantum State Analyzed Particle by Particle
title_fullStr Macroscopic Quantum State Analyzed Particle by Particle
title_full_unstemmed Macroscopic Quantum State Analyzed Particle by Particle
title_sort Macroscopic Quantum State Analyzed Particle by Particle
dc.creator.none.fl_str_mv Beduini, Federica A.
Zielińska, Joanna Ada
Lucivero, Vito G.
Icaza Astiz, Yannick A. de
Mitchell, Morgan W.
author Beduini, Federica A.
author_facet Beduini, Federica A.
Zielińska, Joanna Ada
Lucivero, Vito G.
Icaza Astiz, Yannick A. de
Mitchell, Morgan W.
author_role author
author2 Zielińska, Joanna Ada
Lucivero, Vito G.
Icaza Astiz, Yannick A. de
Mitchell, Morgan W.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Quantum theory
Quantum mechanics
Quàntums, Teoria dels
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica::Fotònica
topic Quantum theory
Quantum mechanics
Quàntums, Teoria dels
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica::Fotònica
description Macroscopic 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.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015-03-27
2015
2015-03-30
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/27115
url https://hdl.handle.net/2117/27115
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv European Commission http://dx.doi.org/10.13039/100011102 Seventh Framework Programme 280169 Atomic Quantum Metrology
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv ACS Publications
publisher.none.fl_str_mv ACS Publications
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869422353947033600
score 15,301603

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