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  • Experimental observations are usually described using theoretical models that make assumptions about the dimensionality of the system under consideration. However, would it be possible to assess the dimension of a completely unknown system only from the results of measurements performed on it, without any extra assumption? The concept of a dimension witness(1-6) answers this question, as it allows bounding the dimension of an unknown system only from measurement statistics. Here, we report on the experimental demonstration of dimension witnesses in a prepare and measure scenario(6). We use photon pairs entangled in polarization and orbital angular momentum(7-9) to generate ensembles of classical and quantum states of dimensions up to 4. We then use a dimension witness to certify their dimensionality as well as their quantum nature. Our work opens newavenues in quantum information science, where dimension represents a powerful resource(10-12), especially for device-independent estimation of quantum systems(13-16) and quantum communications(17,18).
  • Experimental observations are usually described using theoretical models that make assumptions about the dimensionality of the system under consideration. However, would it be possible to assess the dimension of a completely unknown system only from the results of measurements performed on it, without any extra assumption? The concept of a dimension witness(1-6) answers this question, as it allows bounding the dimension of an unknown system only from measurement statistics. Here, we report on the experimental demonstration of dimension witnesses in a prepare and measure scenario(6). We use photon pairs entangled in polarization and orbital angular momentum(7-9) to generate ensembles of classical and quantum states of dimensions up to 4. We then use a dimension witness to certify their dimensionality as well as their quantum nature. Our work opens newavenues in quantum information science, where dimension represents a powerful resource(10-12), especially for device-independent estimation of quantum systems(13-16) and quantum communications(17,18). (en)
Title
  • Experimental estimation of the dimension of classical and quantum systems
  • Experimental estimation of the dimension of classical and quantum systems (en)
skos:prefLabel
  • Experimental estimation of the dimension of classical and quantum systems
  • Experimental estimation of the dimension of classical and quantum systems (en)
skos:notation
  • RIV/61989592:15310/12:33140470!RIV13-MSM-15310___
http://linked.open...avai/riv/aktivita
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  • Z(MSM6198959213)
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  • 8
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  • 135554
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  • RIV/61989592:15310/12:33140470
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  • PHOTONS; ENTANGLEMENT; BELL INEQUALITIES; ORBITAL ANGULAR-MOMENTUM (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV
  • [A613745896EC]
http://linked.open...i/riv/nazevZdroje
  • Nature Physics
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  • 8
http://linked.open...iv/tvurceVysledku
  • Hendrych, Martin
  • Mičuda, Michal
  • Torres, Juan P.
  • Acin, Antonio
  • Brunner, Nicolas
  • Gallego, Rodrigo
http://linked.open...ain/vavai/riv/wos
  • 000307223900008
http://linked.open...n/vavai/riv/zamer
issn
  • 1745-2473
number of pages
http://bibframe.org/vocab/doi
  • 10.1038/NPHYS2334
http://localhost/t...ganizacniJednotka
  • 15310
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