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The Leggett inequalities, named for Anthony James Leggett, who derived them, are a related pair of mathematical expressions concerning the correlations of properties of entangled particles. (As published by Leggett, the inequalities were exemplified in terms of relative angles of elliptical and linear polarizations.) They are fulfilled by a large class of physical theories based on particular non-local and realistic assumptions, that may be considered to be plausible or intuitive according to common physical reasoning.

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  • Les desigualtats de Leggett, que reben el seu nom del Premi Nobel de Físiques Anthony James Leggett que les va derivar, són un parell d'expressions matemàtiques relacionades que descriuen correlacions de les propietats de partícules entrellaçades. (Les desigualtats publicades per Legget van ser exemplificades en termes d'angles relatius de polaritzacions el·líptiques i lineals.) Són desigualtats satisfetes per un gran nombre de teories físiques basades en particular en suposicions no-locals i realistes, que poden ser considerades com a versemblants o intuïtives d'acord amb el sentit comú físic. Les desigualtats de Leggett són violades per la mecànica quàntica. Resultats experimentals realitzats el 2007 i 2010 han demostrat un millor acord amb la mecànica quàntica que amb les desigualtats de Leggett. Donat que les proves experimentals sobre les desigualtats de Bell han eliminat la teoria de realisme local en mecànica quàntica, la violació de les desigualtats de Leggett es considerada com una falsabilitat del realisme en mecànica quàntica, és a dir de la idea "que els sistemes físics posseeixen conjunts complets de valors definitius per diversos paràmetres previs a, i independents de, la mesura experimental". (ca)
  • The Leggett inequalities, named for Anthony James Leggett, who derived them, are a related pair of mathematical expressions concerning the correlations of properties of entangled particles. (As published by Leggett, the inequalities were exemplified in terms of relative angles of elliptical and linear polarizations.) They are fulfilled by a large class of physical theories based on particular non-local and realistic assumptions, that may be considered to be plausible or intuitive according to common physical reasoning. The Leggett inequalities are violated by quantum mechanical theory. The results of experimental tests in 2007 and 2010 have shown agreement with quantum mechanics rather than the Leggett inequalities. Given that experimental tests of Bell's inequalities have ruled out local realism in quantum mechanics, the violation of Leggett's inequalities is considered to have falsified realism in quantum mechanics. In quantum mechanics "realism" means "notion that physical systems possess complete sets of definite values for various parameters prior to, and independent of, measurement". (en)
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  • Les desigualtats de Leggett, que reben el seu nom del Premi Nobel de Físiques Anthony James Leggett que les va derivar, són un parell d'expressions matemàtiques relacionades que descriuen correlacions de les propietats de partícules entrellaçades. (Les desigualtats publicades per Legget van ser exemplificades en termes d'angles relatius de polaritzacions el·líptiques i lineals.) Són desigualtats satisfetes per un gran nombre de teories físiques basades en particular en suposicions no-locals i realistes, que poden ser considerades com a versemblants o intuïtives d'acord amb el sentit comú físic. (ca)
  • The Leggett inequalities, named for Anthony James Leggett, who derived them, are a related pair of mathematical expressions concerning the correlations of properties of entangled particles. (As published by Leggett, the inequalities were exemplified in terms of relative angles of elliptical and linear polarizations.) They are fulfilled by a large class of physical theories based on particular non-local and realistic assumptions, that may be considered to be plausible or intuitive according to common physical reasoning. (en)
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  • Leggett inequality (en)
  • Desigualtats de Leggett (ca)
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