Violation of the Leggett–Garg inequality with weak measurements of photons
Identifieur interne : 001B44 ( Pmc/Corpus ); précédent : 001B43; suivant : 001B45Violation of the Leggett–Garg inequality with weak measurements of photons
Auteurs : M. E. Goggin ; M. P. Almeida ; M. Barbieri ; B. P. Lanyon ; J. L. O Rien ; A. G. White ; G. J. PrydeSource :
- Proceedings of the National Academy of Sciences of the United States of America [ 0027-8424 ] ; 2011.
Abstract
By weakly measuring the polarization of a photon between two strong polarization measurements, we experimentally investigate the correlation between the appearance of anomalous values in quantum weak measurements and the violation of realism and nonintrusiveness of measurements. A quantitative formulation of the latter concept is expressed in terms of a Leggett–Garg inequality for the outcomes of subsequent measurements of an individual quantum system. We experimentally violate the Leggett–Garg inequality for several measurement strengths. Furthermore, we experimentally demonstrate that there is a one-to-one correlation between achieving strange weak values and violating the Leggett–Garg inequality.
Url:
DOI: 10.1073/pnas.1005774108
PubMed: 21220296
PubMed Central: 3029769
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PMC:3029769Le document en format XML
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Barbieri</name><affiliation><nlm:aff id="aff1">Department of Physics and Centre for Quantum Computer Technology, University of Queensland, Brisbane 4072, Australia;</nlm:aff></affiliation><affiliation><nlm:aff id="aff3">Groupe d’Optique Quantique, Laboratoire Charles Fabry, Institut d’Optique—Graduate School, F91127 Palaiseau Cedex, France;</nlm:aff></affiliation></author><author><name sortKey="Lanyon, B P" sort="Lanyon, B P" uniqKey="Lanyon B" first="B. P." last="Lanyon">B. P. Lanyon</name><affiliation><nlm:aff id="aff1">Department of Physics and Centre for Quantum Computer Technology, University of Queensland, Brisbane 4072, Australia;</nlm:aff></affiliation></author><author><name sortKey="O Rien, J L" sort="O Rien, J L" uniqKey="O Rien J" first="J. L." last="O Rien">J. L. O Rien</name><affiliation><nlm:aff wicri:cut="; and" id="aff4">Centre for Quantum Photonics, H. H. Wills Physics Laboratory, and Department of Electrical and Electronic Engineering, University of Bristol, Merchant Venturers Building, Woodland Road, Bristol, BS8 1UB, United Kingdom</nlm:aff></affiliation></author><author><name sortKey="White, A G" sort="White, A G" uniqKey="White A" first="A. G." last="White">A. G. White</name><affiliation><nlm:aff id="aff1">Department of Physics and Centre for Quantum Computer Technology, University of Queensland, Brisbane 4072, Australia;</nlm:aff></affiliation></author><author><name sortKey="Pryde, G J" sort="Pryde, G J" uniqKey="Pryde G" first="G. J." last="Pryde">G. J. Pryde</name><affiliation><nlm:aff id="aff5">Centre for Quantum Dynamics and Centre for Quantum Computer Technology, Griffith University, Brisbane, 4111, Australia</nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">21220296</idno><idno type="pmc">3029769</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3029769</idno><idno type="RBID">PMC:3029769</idno><idno type="doi">10.1073/pnas.1005774108</idno><date when="2011">2011</date><idno type="wicri:Area/Pmc/Corpus">001B44</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">001B44</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Violation of the Leggett–Garg inequality with weak measurements of photons</title><author><name sortKey="Goggin, M E" sort="Goggin, M E" uniqKey="Goggin M" first="M. E." last="Goggin">M. E. Goggin</name><affiliation><nlm:aff id="aff1">Department of Physics and Centre for Quantum Computer Technology, University of Queensland, Brisbane 4072, Australia;</nlm:aff></affiliation><affiliation><nlm:aff id="aff2">Physics Department, Truman State University, Kirksville, MO 63501;</nlm:aff></affiliation></author><author><name sortKey="Almeida, M P" sort="Almeida, M P" uniqKey="Almeida M" first="M. P." last="Almeida">M. P. Almeida</name><affiliation><nlm:aff id="aff1">Department of Physics and Centre for Quantum Computer Technology, University of Queensland, Brisbane 4072, Australia;</nlm:aff></affiliation></author><author><name sortKey="Barbieri, M" sort="Barbieri, M" uniqKey="Barbieri M" first="M." last="Barbieri">M. Barbieri</name><affiliation><nlm:aff id="aff1">Department of Physics and Centre for Quantum Computer Technology, University of Queensland, Brisbane 4072, Australia;</nlm:aff></affiliation><affiliation><nlm:aff id="aff3">Groupe d’Optique Quantique, Laboratoire Charles Fabry, Institut d’Optique—Graduate School, F91127 Palaiseau Cedex, France;</nlm:aff></affiliation></author><author><name sortKey="Lanyon, B P" sort="Lanyon, B P" uniqKey="Lanyon B" first="B. P." last="Lanyon">B. P. Lanyon</name><affiliation><nlm:aff id="aff1">Department of Physics and Centre for Quantum Computer Technology, University of Queensland, Brisbane 4072, Australia;</nlm:aff></affiliation></author><author><name sortKey="O Rien, J L" sort="O Rien, J L" uniqKey="O Rien J" first="J. L." last="O Rien">J. L. O Rien</name><affiliation><nlm:aff wicri:cut="; and" id="aff4">Centre for Quantum Photonics, H. H. Wills Physics Laboratory, and Department of Electrical and Electronic Engineering, University of Bristol, Merchant Venturers Building, Woodland Road, Bristol, BS8 1UB, United Kingdom</nlm:aff></affiliation></author><author><name sortKey="White, A G" sort="White, A G" uniqKey="White A" first="A. G." last="White">A. G. White</name><affiliation><nlm:aff id="aff1">Department of Physics and Centre for Quantum Computer Technology, University of Queensland, Brisbane 4072, Australia;</nlm:aff></affiliation></author><author><name sortKey="Pryde, G J" sort="Pryde, G J" uniqKey="Pryde G" first="G. J." last="Pryde">G. J. Pryde</name><affiliation><nlm:aff id="aff5">Centre for Quantum Dynamics and Centre for Quantum Computer Technology, Griffith University, Brisbane, 4111, Australia</nlm:aff></affiliation></author></analytic><series><title level="j">Proceedings of the National Academy of Sciences of the United States of America</title><idno type="ISSN">0027-8424</idno><idno type="eISSN">1091-6490</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>By weakly measuring the polarization of a photon between two strong polarization measurements, we experimentally investigate the correlation between the appearance of anomalous values in quantum weak measurements and the violation of realism and nonintrusiveness of measurements. A quantitative formulation of the latter concept is expressed in terms of a Leggett–Garg inequality for the outcomes of subsequent measurements of an individual quantum system. We experimentally violate the Leggett–Garg inequality for several measurement strengths. Furthermore, we experimentally demonstrate that there is a one-to-one correlation between achieving strange weak values and violating the Leggett–Garg inequality.</p></div></front></TEI><pmc article-type="research-article"><pmc-comment>The publisher of this article does not allow downloading of the full text in XML form.</pmc-comment>
<front><journal-meta><journal-id journal-id-type="nlm-ta">Proc Natl Acad Sci U S A</journal-id><journal-id journal-id-type="hwp">pnas</journal-id><journal-id journal-id-type="pmc">pnas</journal-id><journal-id journal-id-type="publisher-id">PNAS</journal-id><journal-title-group><journal-title>Proceedings of the National Academy of Sciences of the United States of America</journal-title></journal-title-group><issn pub-type="ppub">0027-8424</issn><issn pub-type="epub">1091-6490</issn><publisher><publisher-name>National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">21220296</article-id><article-id pub-id-type="pmc">3029769</article-id><article-id pub-id-type="publisher-id">201005774</article-id><article-id pub-id-type="doi">10.1073/pnas.1005774108</article-id><article-categories><subj-group subj-group-type="heading"><subject>Physical Sciences</subject><subj-group><subject>Physics</subject></subj-group></subj-group></article-categories><title-group><article-title>Violation of the Leggett–Garg inequality with weak measurements of photons</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Goggin</surname><given-names>M. E.</given-names></name><xref ref-type="aff" rid="aff1"><sup>a</sup></xref><xref ref-type="aff" rid="aff2"><sup>b</sup></xref><xref ref-type="corresp" rid="cor1"><sup>1</sup></xref></contrib><contrib contrib-type="author"><name><surname>Almeida</surname><given-names>M. P.</given-names></name><xref ref-type="aff" rid="aff1"><sup>a</sup></xref></contrib><contrib contrib-type="author"><name><surname>Barbieri</surname><given-names>M.</given-names></name><xref ref-type="aff" rid="aff1"><sup>a</sup></xref><xref ref-type="aff" rid="aff3"><sup>c</sup></xref></contrib><contrib contrib-type="author"><name><surname>Lanyon</surname><given-names>B. P.</given-names></name><xref ref-type="aff" rid="aff1"><sup>a</sup></xref></contrib><contrib contrib-type="author"><name><surname>O’Brien</surname><given-names>J. L.</given-names></name><xref ref-type="aff" rid="aff4"><sup>d</sup></xref></contrib><contrib contrib-type="author"><name><surname>White</surname><given-names>A. G.</given-names></name><xref ref-type="aff" rid="aff1"><sup>a</sup></xref></contrib><contrib contrib-type="author"><name><surname>Pryde</surname><given-names>G. J.</given-names></name><xref ref-type="aff" rid="aff5"><sup>e</sup></xref></contrib><aff id="aff1"><label>a</label>Department of Physics and Centre for Quantum Computer Technology, University of Queensland, Brisbane 4072, Australia;</aff><aff id="aff2"><label>b</label>Physics Department, Truman State University, Kirksville, MO 63501;</aff><aff id="aff3"><label>c</label>Groupe d’Optique Quantique, Laboratoire Charles Fabry, Institut d’Optique—Graduate School, F91127 Palaiseau Cedex, France;</aff><aff id="aff4"><label>d</label>Centre for Quantum Photonics, H. H. Wills Physics Laboratory, and Department of Electrical and Electronic Engineering, University of Bristol, Merchant Venturers Building, Woodland Road, Bristol, BS8 1UB, United Kingdom; and</aff><aff id="aff5"><label>e</label>Centre for Quantum Dynamics and Centre for Quantum Computer Technology, Griffith University, Brisbane, 4111, Australia</aff></contrib-group><author-notes><corresp id="cor1"><sup>1</sup>To whom correspondence should be addressed. E-mail: <email>mgoggin@truman.edu</email>.</corresp><fn fn-type="edited-by"><p>Edited by Yakir Aharonov, Tel Aviv University, Tel Aviv, Israel, and approved December 15, 2010 (received for review April 28, 2010)</p></fn><fn fn-type="participating-researchers"><p>Author contributions: M.E.G., M.P.A., M.B., B.P.L., J.L.O., A.G.W., and G.J.P. designed research; M.E.G., M.P.A., and M.B. performed research; M.E.G., M.P.A., M.B., B.P.L., and G.J.P. analyzed data; and M.E.G., M.P.A., M.B., B.P.L., J.L.O., A.G.W., and G.J.P. wrote the paper.</p></fn></author-notes><pub-date pub-type="ppub"><day>25</day><month>1</month><year>2011</year></pub-date><pub-date pub-type="epub"><day>10</day><month>1</month><year>2011</year></pub-date><volume>108</volume><issue>4</issue><fpage>1256</fpage><lpage>1261</lpage><self-uri xlink:title="pdf" xlink:type="simple" xlink:href="pnas.1005774108.pdf"></self-uri><abstract><p>By weakly measuring the polarization of a photon between two strong polarization measurements, we experimentally investigate the correlation between the appearance of anomalous values in quantum weak measurements and the violation of realism and nonintrusiveness of measurements. A quantitative formulation of the latter concept is expressed in terms of a Leggett–Garg inequality for the outcomes of subsequent measurements of an individual quantum system. We experimentally violate the Leggett–Garg inequality for several measurement strengths. Furthermore, we experimentally demonstrate that there is a one-to-one correlation between achieving strange weak values and violating the Leggett–Garg inequality.</p></abstract><kwd-group><kwd>entanglement</kwd><kwd>quantum communication</kwd><kwd>quantum nonlocality</kwd><kwd>quantum measurement</kwd></kwd-group></article-meta></front></pmc></record>Pour manipuler ce document sous Unix (Dilib)
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