Contextuality and Wigner-function negativity in qubit quantum computation
نویسندگان
چکیده
منابع مشابه
Contextuality and Wigner function negativity in qubit quantum computation
1: Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, Canada, 2: Department of Physics and Astronomy, University College London, Gower Street, London, UK, 3: Département de Physique, Université de Sherbrooke, Sherbrooke, Québec, Canada, 4: IQIM, California Institute of Technology, Pasadena, CA, USA, 5: Department of Physics and Astronomy, University of Californi...
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1: Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, Canada, 2: Department of Physics and Astronomy, University College London, Gower Street, London, UK, 3: Département de Physique, Université de Sherbrooke, Sherbrooke, Québec, Canada, 4: IQIM, California Institute of Technology, Pasadena, CA, USA, 5: Department of Physics and Astronomy, University of Californi...
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We establish a link between contextuality of quantum mechanics and quantum-mechanical computation. Specifically, we show that no deterministic measurement-based quantum computation evaluating a non-linear function can be described by a non-contextual hidden-variable model. We give examples for such computations derived from quantum codes with suitable transversality properties, and from a count...
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We present a protocol to evaluate the expectation value of the correlations of measurement outcomes for ensembles of quantum systems, and use it to experimentally demonstrate--under an assumption of fair sampling--the violation of an inequality that is satisfied by any noncontextual hidden-variables theory. The experiment is performed on an ensemble of molecular nuclear spins in the solid state...
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Wheeler’s observer-participancy and the related it from bit credo refer to quantum non-locality and contextuality. The mystery of these concepts slightly starts unveiling if one encodes the (in)compatibilities between qubit observables in the relevant finite geometries. The main objective of this treatise is to outline another conceptual step forward by employing Grothendieck’s dessins d’enfant...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2017
ISSN: 2469-9926,2469-9934
DOI: 10.1103/physreva.95.052334