Noise robustness of the nonlocality of entangled quantum states

Details Noise robustness of the nonlocality of entangled quantum states Noise robustness of the nonlocality of entangled quantum states

2007-03-02

arxiv.org/abs/quant-ph/0703018v2

Phys. Rev. Lett. 99, 040403 (2007)

Physics

Quantum Physics

5 pages, no figures. It contains only minor changes, published version

Scientific paper

10.1103/PhysRevLett.99.040403

We study the nonlocal properties of states resulting from the mixture of an arbitrary entangled state rho of two d-dimensional systems and completely depolarized noise, with respective weights p and 1-p. We first construct a local model for the case in which rho is maximally entangled and p at or below a certain bound. We then extend the model to arbitrary rho. Our results provide bounds on the resistance to noise of the nonlocal correlations of entangled states. For projective measurements, the critical value of the noise parameter p for which the state becomes local is at least asymptotically log(d) larger than the critical value for separability.

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