Genuine hidden quantum nonlocality

Abstract

The nonlocality of certain quantum states can be revealed by using local filters before performing a standard Bell test. This phenomenon, known as hidden nonlocality, has been so far demonstrated only for a restricted class of measurements, namely projective measurements. Here we prove the existence of genuine hidden nonlocality. Specifically, we present a class of two-qubit entangled states, for which we construct a local model for the most general local measurements (POVMs), and show that the states violate a Bell inequality after local filtering. Hence there exist entangled states, the nonlocality of which can be revealed only by using a sequence of measurements. Finally, we show that genuine hidden nonlocality can be maximal. There exist entangled states for which a sequence of measurements can lead to maximal violation of a Bell inequality, while the statistics of non-sequential measurements is always local.

5 pages, no figures

References in corpus (5)

• All bipartite entangled states display some hidden nonlocality
• Noise robustness of the nonlocality of entangled quantum states
• All quantum states useful for teleportation are nonlocal resources
• All entangled states display some hidden nonlocality
• Better Bell Inequality Violation by Collective Measurements

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