Related papers: Refined Tsirelson Bounds on Multipartite Bell Inequalities

Refined Tsirelson Bounds on Multipartite Bell Inequalities

URL: http://arxiv.org/abs/2406.16202v1
Date: Sun, 23 Jun 2024 19:44:45 GMT
Title: Refined Tsirelson Bounds on Multipartite Bell Inequalities
Authors: Rain Lenny, Dana Ben Porath, Eliahu Cohen,
Abstract summary: We present refined Tsirelson (quantum) bounds on the Svetlichny and Mermin-Klyshko inequalities. We analyze concrete examples in which our bounds are strictly tighter than the known bounds.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Despite their importance, there is an on-going challenge characterizing multipartite quantum correlations. The Svetlichny and Mermin-Klyshko (MK) inequalities present constraints on correlations in multipartite systems, a violation of which allows to classify the correlations by using the non-separability property. In this work we present refined Tsirelson (quantum) bounds on these inequalities, derived from inequalities stemming from a fundamental constraint, tightly akin to quantum uncertainty. Unlike the original, known inequalities, our bounds do not consist of a single constant point but rather depend on correlations in specific subsystems (being local correlations for our bounds on the Svetlichny operators and bipartite correlations for our bounds on the MK operators). We analyze concrete examples in which our bounds are strictly tighter than the known bounds.

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