Demonstrating genuine multipartite non-locality on quantum processors using Amazon Braket

This article demonstrates how to test genuine multipartite non-locality (GMNL) on quantum processors using Amazon Braket, moving beyond two-qubit Bell tests to multipartite systems.

• Explains Svetlichny inequality for detecting GMNL in three-or-more-qubit systems where no hybrid local-realist model applies
• Provides implementation steps: GHZ state preparation, measurement circuit construction, and Svetlichny operator mean value computation
• Includes Python code examples for running tests on local simulators and real QPUs via Amazon Braket
• Demonstrates performance comparison across IonQ Aria-1 and IQM Garnet processors for 2–5 qubit systems
• Shows GMNL tests serve as benchmarking tools to assess quantum processor functionality and compare hardware performance

The methodology enables users to verify quantum behavior, benchmark devices, and explore multipartite correlations beyond classical explanation using Amazon Braket's unified interface.