Sudden change in quantum and classical correlations and the Unruh effect

TL;DR

This paper investigates how acceleration and the Unruh effect influence the dynamics of quantum and classical correlations in a two-qubit system, revealing phenomena like sudden changes and correlation destruction at high accelerations.

Contribution

It introduces a detailed analysis of correlation dynamics under acceleration, highlighting the sudden-change behavior and the complete loss of quantum correlations at infinite acceleration.

Findings

Quantum correlations vanish at infinite acceleration.

Classical correlations remain nonzero despite acceleration.

Correlations exhibit sudden-change behavior as acceleration varies.

Abstract

We use the Unruh effect to analyze the dynamics of classical and quantum correlations for a two-qubit system when one of them is uniformly accelerated for a finite amount of proper time. We show that the quantum correlation is completely destroyed in the limit of infinite acceleration, while the classical one remains nonzero. In particular, we show that such correlations exhibit the so-called sudden-change behavior as a function of acceleration. Eventually, we discuss how our results can be interpreted when the system lies in the vicinity of the event horizon of a Schwarzschild black hole.