Local Hidden-Variable Model for a Recent Experimental Test of Quantum Nonlocality and Local Contextuality

An experiment has recently been performed to demonstrate quantum nonlocality by establishing contextuality in one of a pair of photons encoding four qubits; however, low detection efficiencies and use of the fair-sampling hypothesis leave these results open to possible criticism due to the detection loophole. In this talk, a physically motivated local hidden-variable model is described as a possible mechanism for explaining the experimentally observed results. The model, though not intrinsically contextual, acquires this quality upon post-selection of coincident detections. [Physics Letters A 381, 2230 (2017).]