Generation and sudden death of entanglement in qubit-qutrit systems in depolarizing noise

TL;DR

This paper investigates how depolarizing noise affects entanglement dynamics in qubit-qutrit systems, revealing conditions for entanglement creation, critical points, and scenarios preventing entanglement sudden death, which is vital for quantum information processing.

Contribution

It demonstrates that depolarizing noise can induce entanglement and identifies conditions where entanglement sudden death does not occur in qubit-qutrit systems.

Findings

Depolarizing noise can generate entanglement in hybrid systems.

A critical point exists where all states are equally entangled.

No ESD occurs when only the qubit or multilocal/global environments are involved.

Abstract

The dynamics of entanglement in some hybrid qubit-qutrit systems under the influence of global, collective, local and multilocal depolarizing noise is studied. It is shown that the depolarizing noise can be used to induce entanglement. A critical point exists under every coupling of the system with the environment at which all the states are equally entangled. Furthermore, it is seen that no ESD occurs when either only the qubit is coupled to its local environment or the system is coupled to multilocal or global environment. This is an important result for various quantum information processing tasks and hence needs further investigation.