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arXiv · 1805.01859

Resilience of realism-based nonlocality to local disturbance

V. S. Gomes·R. M. Angelo
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Abstract

Employing a procedure called monitoring---via a completely positive trace-preserving map that is able to interpolate between weak and projective measurements---we investigate the resilience of the recently proposed realism-based nonlocality to local and bilocal weak measurements. This analysis indicates realism-based nonlocality as the most ubiquitous and persistent form of quantumness within a wide class of quantum-correlation quantifiers. In particular, we show that the set of states possessing this type of quantumness forms a strict superset of symmetrically discordant states and, therefore, of discordant, entangled, steerable, and Bell-nonlocal states. Moreover, we find that, under monitoring, realism-based nonlocality is not susceptible to sudden death.

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V. S. Gomes, R. M. Angelo. 2019-01-21. Resilience of realism-based nonlocality to local disturbance. https://doi.org/10.1103/physreva.99.012109

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