Mutual information harvested by uniformly accelerated particle detectors

TL;DR

This paper studies how two uniformly accelerated particle detectors can extract mutual information, revealing differences from thermal bath scenarios despite similar single-detector responses, highlighting unique quantum correlations due to acceleration.

Contribution

It demonstrates that mutual information behavior between accelerating detectors differs from inertial thermal cases, emphasizing the role of detector pair correlations and trajectory effects.

Findings

Single detectors respond thermally, but mutual information differs for accelerating pairs.

Mutual information between accelerating detectors is not equivalent to that in a thermal bath.

Wightman functions for pairs differ from single detector cases, affecting correlations.

Abstract

We investigate the mutual information harvesting protocol for two uniformly accelerated particle detectors. We numerically show that, while a single detector responds as if it is immersed in a thermal bath, the quantum mutual information between two accelerating detectors behaves differently than that of two inertial detectors in a thermal bath. This is due to the fact that while the Wightman function along the trajectory of a single uniformly accelerating detector is the same as that of as a detector in a thermal bath, a pair of detectors in the same respective cases will have different Wightman functions.