Sudden death of entanglement and teleportation fidelity loss via the Unruh effect

TL;DR

This paper examines how the Unruh effect causes entanglement to abruptly vanish and degrades teleportation fidelity when one qubit undergoes acceleration, highlighting the impact of relativistic effects on quantum information.

Contribution

It provides a detailed analysis of the acceleration-induced entanglement sudden death and its effect on teleportation fidelity, incorporating mutual information and concurrence calculations.

Findings

Entanglement experiences sudden death at finite acceleration.

Teleportation fidelity decreases with increasing acceleration.

Mutual information and concurrence are significantly affected by acceleration.

Abstract

We use the Unruh effect to investigate how the teleportation of quantum states is affected when one of the entangled qubits used in the process is under the influence of some external force. In order to reach a comprehensive understanding, a detailed analysis of the acceleration effect on such entangled qubit system is performed. In particular, we calculate the mutual information and concurrence between the two qubits and show that the latter has a ``sudden death" at a finite acceleration, whose value will depend on the time interval along which the detector is accelerated.