Controlling transfer of quantum correlations among bi-partitions of a composite quantum system by combining noisy environments

TL;DR

This paper explores how different noisy environments affect the transfer and control of quantum correlations in a bipartite quantum system, revealing new ways to manipulate entanglement and distinguish types of correlations.

Contribution

It demonstrates that combining non-identical noisy environments enables control over quantum correlation transfer and allows differentiation between quantum and classical correlations.

Findings

Entanglement transfer can be controlled by environment types.

Complete correlation transfer is possible with mixed noisy environments.

Quantum and classical correlations can be distinguished through environment combination.

Abstract

The correlation dynamics is investigated for various bi-partitions of a composite system consisting of two qubits, and two independent and non-identical noisy environments. The two qubits have no direct interaction with each other and locally interact with their environments. Classical and quantum correlations including entanglement are initially prepared only between the two qubits. We find that, contrary to the identical noisy environment case, the entanglement and quantum correlation transfer directions can be controlled by combining different noisy environments. The amplitude damping environment determines whether there exists entanglement transfer among the bi-partitions of a composite system. When one qubit is coupled to an amplitude damping environment but another one to a bit-flip one, we find a very interesting result that all the quantum and classical correlations, and even the entanglement, originally existing between the qubits, can be completely transferred without any loss to the qubit coupled to the bit-flip environment and the amplitude-damping environment. We also notice that it is possible to distinguish the quantum correlation from the classical correlation and entanglement by combining different noisy environments.