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Controlling transfer of quantum correlations among bi-partitions of a composite quantum system by combining different noisy environments |
| Zhang Xiu-Xing(张修兴) and Li Fu-Li(李福利)† |
| Department of Applied Physics, Xi'an Jiaotong University, Xi'an 710049, China |
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Abstract The correlation dynamics are investigated for various bi-partitions of a composite quantum 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 the entanglement are initially prepared only between the two qubits. We find that contrary to the identical noisy environment case, the quantum correlation transfer direction can be controlled by combining different noisy environments. The amplitude-damping environment determines whether there exists the entanglement transfer among bi-partitions of the system. When one qubit is coupled to an amplitude-damping environment and the other one to a bit-flip one, we find a very interesting result that all the quantum and the 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-flit environment and the amplitude-damping environment. We also notice that it is possible to distinguish the quantum correlation from the classical correlation and the entanglement by combining different noisy environments.
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Received: 29 January 2011
Revised: 06 May 2011
Accepted manuscript online:
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PACS:
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03.65.Yz
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(Decoherence; open systems; quantum statistical methods)
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03.65.Ta
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(Foundations of quantum mechanics; measurement theory)
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03.67.-a
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(Quantum information)
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| Fund: Project supported by the National Basic Research Program of China (Grant No. 2010CB923102), the Special Prophase Project
on the National Basic Research Program of China (Grant No. 2011CB311807), and the National Natural Science Foundation of
China (Grand No. 11074199). |
Cite this article:
Zhang Xiu-Xing(张修兴) and Li Fu-Li(李福利) Controlling transfer of quantum correlations among bi-partitions of a composite quantum system by combining different noisy environments 2011 Chin. Phys. B 20 110302
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