Quantum Correlation Bounds for Quantum Information Experiments Optimization: the Wigner Inequality Case

TL;DR

This paper investigates the quantum correlation bounds related to the modified Wigner inequality, both theoretically and experimentally, to optimize violation conditions and enhance quantum key distribution security.

Contribution

It provides the first comprehensive analysis of quantum correlation bounds for the modified Wigner inequality, including experimental optimization and application to Ekert's protocol.

Findings

Identified optimal experimental configurations for maximal violation.

Demonstrated the security implications for quantum key distribution.

Extended analysis to practical implementation of Ekert's protocol.

Abstract

Violation of modified Wigner inequality by means binary bipartite quantum system allows the discrimination between the quantum world and the classical local-realistic one, and also ensures the security of Ekert-like quantum key distribution protocol. In this paper we study both theoretically and experimentally the bounds of quantum correlation associated to the modified Wigner's inequality finding the optimal experimental configuration for its maximal violation. We also extend this analysis to the implementation of Ekert's protocol.