Controlling transfer of quantum correlations among bi-partitions of a composite quantum system by combining noisy environments
arXiv:1012.3033 · doi:10.1088/1674-1056/20/11/110302
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.
22 pages, 9 figures
References in corpus (8)
- Experimental quantum computing without entanglement
- Unified View of Quantum and Classical Correlations
- Robustness of quantum discord to sudden death
- Non-Markovian Dynamics of Quantum Discord
- Quantum correlations in spin chains at finite temperatures and quantum phase transitions
- Sudden Birth Versus Sudden Death of Entanglement in Multipartite Systems
- System-reservoir dynamics of quantum and classical correlations
- Entanglement versus Quantum Discord in Two Coupled Double Quantum Dots