In this presentation, I will talk about the relaxation of two central assumptions in the standard locally realistic hidden variable (LRHV) inequalities: free will in choosing of measurement settings and presence of perfect detectors at the measurement devices. Quantum correlations violating LRHV inequalities are called quantum nonlocal correlations. In principle, in an adversarial situation, there could be a hidden variable introducing bias in the selection of measurement settings but observers with no access to that hidden variable could be unaware of the bias. Whereas in practice, detectors don’t have perfect efficiency. A main focus of this presentation is introduction of a framework where given a quantum state with nonlocal behavior under constrained free will, one can determine the threshold values of detector parameters (detector inefficiency and dark counts) such that the detectors are robust enough to certify nonlocality. Next, I will introduce a new class of LRHV inequalities with constrained free will and discuss their implications in testing of quantum nonlocal correlations.

Phys. Rev. A 107, 012212 (2023)

Zoom link: https://us02web.zoom.us/j/81795783393

Webinar ID: 817 9578 3393