Residual entanglement of accelerated fermions is not nonlocal

TL;DR

This paper investigates whether residual entanglement in accelerated fermionic systems exhibits nonlocality, concluding that such entanglement does not violate Bell inequalities at high accelerations, challenging previous assumptions.

Contribution

It demonstrates that residual entanglement in non-inertial fermionic systems is not nonlocal, extending analysis beyond the single mode approximation.

Findings

Residual entanglement does not violate CHSH inequality at high accelerations

Quantum correlations survive but are not nonlocal in accelerated fermions

Results extend beyond the single mode approximation

Abstract

We analyze the operational meaning of the residual entanglement in non-inertial fermionic systems in terms of the achievable violation of the Clauser-Horne-Shimony-Holt (CHSH) inequality. We demonstrate that the quantum correlations of fermions, which were previously found to survive in the infinite acceleration limit, cannot be considered to be non-local. The entanglement shared by an inertial and an accelerated observer cannot be utilized for the violation of the CHSH inequality in case of high accelerations. Our results are shown to extend beyond the single mode approximation commonly used in the literature.