# Tripartite realism-based quantum nonlocality

## TL;DR

This paper introduces a tripartite realism-based nonlocality measure that captures different quantum correlations than Bell nonlocality, showing its relation to entanglement and monogamy in noisy states.

## Contribution

It extends the realism-based nonlocality measure to tripartite systems, revealing its connection to entanglement and monogamy properties in mixed states.

## Key findings

- Reduces to genuine tripartite entanglement for certain pure states
- Manifests in correlated mixed states without quantum correlations
- Exhibits monogamy in noisy GHZ and W states

## Abstract

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.