Home | About Journal | Web Links | E-mail Alerts | RSS RSS Icon | Browse
Previous Article Next Article

State-Independent Quantum Contextuality with Single Photons

Source: Phys. Rev. Lett. 103, 160405 (2009); doi:10.1103/PhysRevLett.103.160405

Published 16 October 2009

PACS
  • 03.65.Ta
    Foundations of quantum mechanics; measurement theory
  • 03.65.Ud
    Entanglement and quantum nonlocality
  • 42.50.Xa
    Optical tests of quantum theory
  • YEAR: 2009
PUBLICATION DATA
Publisher:
AIP is a member of CrossRef APS
Elias Amselem,1 Magnus Rådmark,1 Mohamed Bourennane,1 and Adán Cabello2
1Department of Physics, Stockholm University, S-10691, Stockholm, Sweden
2Departamento de Física Aplicada II, Universidad de Sevilla, E-41012 Sevilla, Spain
We present an experimental state-independent violation of an inequality for noncontextual theories on single particles. We show that 20 different single-photon states violate an inequality which involves correlations between results of sequential compatible measurements by at least 419 standard deviations. Our results show that, for any physical system, even for a single system, and independent of its state, there is a universal set of tests whose results do not admit a noncontextual interpretation. This sheds new light on the role of quantum mechanics in quantum information processing. ©2009 The American Physical Society
History: Received 12 August 2009; published 16 October 2009
Permalink: http://link.aps.org/abstract/PRL/v103/e160405
ADVERTISEMENT