Persistence of Tripartite Nonlocality for Non-inertial Observers

TL;DR

This paper investigates how tripartite and bipartite nonlocal correlations behave for observers in non-inertial frames, revealing that tripartite nonlocality can persist despite high acceleration, unlike bipartite nonlocality.

Contribution

It demonstrates that genuine tripartite nonlocality, measured by Svetlichny inequality, can be maintained at any finite acceleration, unlike bipartite nonlocality.

Findings

Fermionic entanglement persists at high acceleration.

Bell/CHSH inequality violations cease at large but finite acceleration.

Svetlichny inequality can be violated at any finite acceleration.

Abstract

We consider the behaviour of bipartite and tripartite non-locality between fermionic entangled states shared by observers, one of whom uniformly accelerates. We find that while fermionic entanglement persists for arbitrarily large acceleration, the Bell/CHSH inequalities cannot be violated for sufficiently large but finite acceleration. However the Svetlichny inequality, which is a measure of genuine tripartite non-locality, can be violated for any finite value of the acceleration.