Proposed test of macroscopic quantum contextuality

Adán Cabello
Phys. Rev. A 82, 032110 – Published 13 September 2010

Abstract

We show that, for any system with a number of levels which can be identified with n qubits, there is an inequality for the correlations between three compatible dichotomic measurements which must be satisfied by any noncontextual theory, but is violated by any quantum state. Remarkably, the violation grows exponentially with n, and the tolerated error per correlation also increases with n, showing that state-independent quantum contextuality is experimentally observable in complex systems.

  • Figure
  • Received 19 February 2010

DOI:https://doi.org/10.1103/PhysRevA.82.032110

©2010 American Physical Society

Authors & Affiliations

Adán Cabello

  • Departamento de Física Aplicada II, Universidad de Sevilla, E-41012 Sevilla, Spain

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Issue

Vol. 82, Iss. 3 — September 2010

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