Now showing items 1-7 of 7

    • Almost quantum correlations 

      Navascués, Miguel; Guryanova, Yelena; Hoban, Matty J.; Acín, Antonio (Nature Publishing group, 2015-02-20)
      Article
      Open Access
      Quantum theory is not only successfully tested in laboratories every day but also constitutes a robust theoretical framework: small variations usually lead to implausible consequences, such as faster-than-light communication. ...
    • Detection loophole attacks on semi-device-independent quantum and classical protocols 

      Dall’Arno, Michele; Passaro, Elsa; Gallego, Rodrigo; Pawlowski, Marcin; Acín, Antonio (Rinton Press, 2015-01-01)
      Article
      Open Access
      Semi-device-independent quantum protocols realize information tasks – e.g. secure key distribution, random access coding, and randomness generation – in a scenario where no assumption on the internal working of the devices ...
    • Entanglement and Nonlocality are Inequivalent for Any Number of Parties 

      Augusiak, R.; Demianowicz, M.; Tura, J.; Acín, Antonio (APS, 2015-07-15)
      Article
      Open Access
      Understanding the relation between nonlocality and entanglement is one of the fundamental problems in quantum physics. In the bipartite case, it is known that these two phenomena are inequivalent, as there exist entangled ...
    • Inequivalence of entanglement, steering, and Bell nonlocality for general measurements 

      Quintino, Marco Tulio; Vértesi, Tamas; Cavalcanti, Daniel; Augusiak, Remigiusz; Demianowicz, Maciej; Acín, Antonio; Brunner, Nicolas (APS, 2015-09-08)
      Article
      Open Access
      Einstein-Podolsky-Rosen steering is a form of inseparability in quantum theory commonly acknowledged to be intermediate between entanglement and Bell nonlocality. However, this statement has so far only been proven for a ...
    • Maximally Nonlocal Theories Cannot Be Maximally Random 

      Torre, Gonzalo de la; Hoban, Matty J.; Dhara, Chirag; Prettico, Giuseppe; Acín, Antonio (APS, 2015-04-22)
      Article
      Open Access
      Correlations that violate a Bell inequality are said to be nonlocal; i.e., they do not admit a local and deterministic explanation. Great effort has been devoted to study how the amount of nonlocality (as measured by a ...
    • Optimal randomness generation from optical Bell experiments 

      Máttar, Ajenadro; Skrzypczyk, Paul; Brask, Jonatan Bohr; Cavalcanti, Daniel; Acín, Antonio (IOP, 2015-02-10)
      Article
      Open Access
    • Thermodynamic cost of creating correlations 

      Huber, Marcus; Perarnau-Llobet, Martí; Hovhannisyan, Karen V.; Skrzypczyk, Paul; Klöckl, Claude; Brunner, Nicolas; Acín, Antonio (IOP, 2015-06-10)
      Article
      Open Access
      We investigate the fundamental limitations imposed by thermodynamics for creating correlations. Considering a collection of initially uncorrelated thermal quantum systems, we ask how much classical and quantum correlations ...