Entanglement dynamics of a qubit-qutrit system in non-inertial frames

TL;DR

This paper studies how decoherence affects entanglement in a qubit-qutrit system within non-inertial frames, revealing conditions under which entanglement sudden death can be avoided or occurs.

Contribution

It demonstrates that certain decoherence channels do not cause entanglement sudden death in non-inertial frames, expanding understanding of entanglement robustness under relativistic effects.

Findings

ESD can be avoided in non-inertial frames with dephasing channels.

Higher decoherence levels lead to ESD in phase flip channels.

Dephasing environment prevents ESD regardless of the Unruh effect.

Abstract

The effect of decoherence on a qubit-qutrit system under the influence of global and multilocal decoherence in non-inertial frames is investigated. It is shown that the entanglement sudden death (ESD) can be avoided in non-inertial frames in the presence of dephasing and bit-trit phase flip channels for entire range of decoherence. However, ESD behaviour is seen for higher level of decoherence in case of phase flip and bit-trit flip channels. Irrespective of the entanglement degradation caused by the Unruh effect, no ESD occurs for the dephasing environment. Furthermore, flipping channels have approximately similar effect on the entanglement of the hybrid system.