Entropic uncertainty and quantum non-classicality of Unruh-Dewitt detectors in relativity

TL;DR

This paper studies how the Unruh effect influences quantum uncertainty and correlations in accelerating detectors, revealing that acceleration increases uncertainty while decreasing quantum discord, offering insights into relativistic quantum systems.

Contribution

It introduces an analysis of Unruh thermal noise effects on quantum uncertainty and discord in Unruh-Dewitt detectors, highlighting the impact of acceleration and coupling strength.

Findings

Unruh effect increases quantum uncertainty.

Unruh effect decreases quantum discord.

Uncertainty is inversely related to quantum discord.

Abstract

An object moving with the acceleration will change the temperature of environment around it, because of the presence of the Unruh thermal effect. In this work, we investigate the impact of Unruh thermal noise on the quantum-memory-assisted {entropic} uncertainty and quantum correlation regarding a pair of Unruh-Dewitt detectors. Specifically, we examine how the acceleration, the coupling strength between the external field and the detector, and the initial state affect the uncertainty and the system's quantum discord. It turns out that the Unruh effect will result in the loss of the systemic quantumness and inflation of the uncertainty. Moreover, it is revealed that the uncertainty is reversely correlated with the system's quantum discord. Thereby, it is believed that our investigations provide new insights into understanding the behavior of objects in the relativistic background.