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Superactivation of Quantum Nonlocality

Carlos Palazuelos
Phys. Rev. Lett. 109, 190401 – Published 5 November 2012
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Abstract

In this Letter we show that quantum nonlocality can be superactivated. That is, one can obtain violations of Bell inequalities by tensorizing a local state with itself. In the second part of this work we study how large these violations can be. In particular, we show the existence of quantum states with very low Bell violation but such that five copies of them give very large violations. In fact, this gap can be made arbitrarily large by increasing the dimension of the states.

  • Received 4 July 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.190401

© 2012 American Physical Society

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Published 5 November 2012

The combination of several quantum states that are local can yield a nonlocal state.

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Authors & Affiliations

Carlos Palazuelos

  • Instituto de Ciencias Matemáticas (ICMAT), Consejo Superior de Investigaciones Científicas, Campus de Cantoblanco, 28049 Madrid, Spain

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Issue

Vol. 109, Iss. 19 — 9 November 2012

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