Environment generated quantum correlations in bipartite qubit-qutrit systems

TL;DR

This paper investigates how environmental noise affects entanglement and quantum discord in qubit-qutrit systems, revealing conditions for their decay, invariance, and environment-induced quantum correlations.

Contribution

It provides a detailed analysis of entanglement and discord dynamics in qubit-qutrit systems under different noise couplings, highlighting environment-induced quantum correlations.

Findings

Entanglement experiences unavoidable sudden death.

Quantum discord's behavior depends on environment and system dimensions.

Environment can induce nonclassical correlations under certain couplings.

Abstract

The dynamics of entanglement and quantum discord for qubit-qutrit systems are studied in the presence of phase damping and amplitude damping noises. Both one way and two couplings of the marginal systems with the environments are considered. Entanglement sudden death is unavoidable under any setup, however, the required time span depends on the way of coupling. On the other hand, the dynamics of quantum discord strongly depends both on the nature of environment and on the number of dimensions of the Hilbert space of the coupled marginal system. We show that freezing and invariance of quantum discord, as previously reported in the literature, are limited to some special cases. Most importantly, it is noted that under some particular coupling the existence of environment can guarantee the generation of nonclassical correlations.