From an operational criterion of physical reality, a quantifier of realism-based nonlocality was recently introduced for two-part quantum states. This measure has shown to capture aspects that are rather different from Bell nonlocality. Here we take a step further and introduce a tripartite realism-based nonlocality quantifier. We show that this measure reduces to genuine tripartite entanglement for a certain class of pure tripartite states and manifests itself in correlated mixed states even in the absence of quantum correlations. A case study for noisy GHZ and W states points out the existence of scenarios where the realism-based nonlocality is monogamous.
@article{arxiv.1908.05781,
title = {Tripartite realism-based quantum nonlocality},
author = {D. M. Fucci and R. M. Angelo},
journal= {arXiv preprint arXiv:1908.05781},
year = {2019}
}