Influence of acceleration on multi-body entangled quantum states

TL;DR

This paper investigates how acceleration affects multi-body entangled quantum states, revealing that acceleration can enhance entanglement and improve phase sensitivity, thus offering a new way to test the anti-Unruh effect experimentally.

Contribution

It demonstrates that acceleration can increase multi-body quantum entanglement, providing insights into the anti-Unruh effect and potential improvements in quantum measurement sensitivity.

Findings

Acceleration increases multi-body entanglement.

Enhanced entanglement improves phase sensitivity.

Supports testing the anti-Unruh effect experimentally.

Abstract

We study the influence of acceleration on the twin-Fock state which is a class of specific multibody entangled quantum state and was already realized experimentally with high precision and sensitivity. We show that the multi-body quantum entanglement can be increased with the acceleration, consistent with the "anti-Unruh effect" in reference to the counterintuitive cooling previously pointed out for an accelerated detector coupled to the vacuum. In particular, this kind of entanglement increase can lead to the improvement of the phase sensitivity, which provides a way to test the anti-Unruh effect in the future experiments.