Scientific article
English

Demonstration of Quantum Nonlocality in the Presence of Measurement Dependence

Published inPhysical review letters, vol. 114, no. 22, 220404
Publication date2015
Abstract

Quantum nonlocality stands as a resource for device independent quantum information processing (DIQIP), such as, for instance, device independent quantum key distribution. We investigate, exper- imentally, the assumption of limited measurement dependence, i.e., that the measurement settings used in Bell inequality tests or DIQIP are partially influenced by the source of entangled particle and/or by an adversary. Using a recently derived Bell-like inequality [G. Pütz, Phys. Rev. Lett. 113, 190402 (2014)] and a 99% fidelity source of partially entangled polarization photonic qubits, we obtain a clear violation of the inequality, excluding a much larger range of measurement dependent local models than would be possible with an adapted Clauser-Horne-Shimony-Holt (CHSH) inequality. It is therefore shown that the measurement independence assumption can be widely relaxed while still demonstrating quantum nonlocality.

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Citation (ISO format)
AKTAS, Djeylan et al. Demonstration of Quantum Nonlocality in the Presence of Measurement Dependence. In: Physical review letters, 2015, vol. 114, n° 22, p. 220404. doi: 10.1103/PhysRevLett.114.220404
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Journal ISSN0031-9007
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