An Improved Tripartite Bell-type Inequality

TL;DR

This paper introduces a new tripartite Bell-type inequality that demonstrates stronger quantum violations and maintains comparable noise tolerance, advancing tests of local realism in quantum systems.

Contribution

A novel Bell-type inequality for tripartite systems with two measurements and outputs per side, showing enhanced violation factors over existing inequalities.

Findings

Quantum violation factor of 3.5

Violation amount of 2.5

White noise tolerance of 0.5

Abstract

So far, various Bell type inequalities have been introduced to test the local realism in tripartite systems. In this article we consider a tripartite system with two measurements in each side and two outputs for each measurement. Then we will introduce a new bell type inequality for this system and we show that this inequality is violated by quantum theory with a violation factor and amount of violation of 3.5 and 2.5 respectively, which exceed those of available inequalities in both cases. Also we will show that the white noise tolerance of this new Bell type expression is 0.5, which agrees with the maximum amount of white noise tolerance of available inequalities up to now.