Decoherence and entanglement degradation of a qubit-qutrit system in non-inertial frames

TL;DR

This paper investigates how decoherence affects entanglement in a qubit-qutrit system within non-inertial frames, revealing conditions under which entanglement can be preserved or degraded, with implications for quantum information in relativistic settings.

Contribution

It provides a detailed analysis of entanglement degradation under various decoherence channels in non-inertial frames, highlighting the conditions that prevent entanglement sudden death.

Findings

Entanglement sudden death can be avoided in non-inertial frames with certain decoherence channels.

Depolarizing channel causes more entanglement degradation at low decoherence levels.

No entanglement sudden death occurs for any acceleration of the non-inertial observer.

Abstract

We study the effect of decoherence on a qubit-qutrit system under the influence of global, local and multilocal decoherence in non-inertial frames. We show that the entanglement sudden death can be avoided in non-inertial frames in the presence of amplitude damping, depolarizing and phase damping channels. However, degradation of entanglement is seen due to Unruh effect. It is shown that for lower level of decoherence, the depolarizing channel degrades the entanglement more heavily as compared to the amplitude damping and phase damping channels. However, for higher values of decoherence parameters, amplitude damping channel heavily degrades the entanglement of the hybrid system. Further more, no ESD is seen for any value of Rob's acceleration.