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Decoherence for a two-qubit system in a spin-chain environment |
| Yang Yang(杨阳)1, An-Min Wang(王安民)2, Lian-Zhen Cao(曹连振)1, Jia-Qiang Zhao(赵加强)1, Huai-Xin Lu(逯怀新)1 |
1 Department of Physics and Optoelectronic Engineering, Weifang University, Weifang 261061, China;
2 Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China |
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Abstract The quantum coherence and correlation dynamics for a two-qubit system in the Ising spin-chain environment are studied. A sudden change of coherence is found near the critical point, which provides us with an effective way to detect the quantum phase transition. By studying the relationship between quantum discord and coherence, we find that coherence displays the behavior of classical correlation for t<t0, and of quantum discord for t>t0, where t0 is the time-point of a sudden transition between classical and quantum decoherence.
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Received: 02 April 2018
Revised: 27 June 2018
Accepted manuscript online:
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PACS:
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03.65.Ta
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(Foundations of quantum mechanics; measurement theory)
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03.65.Yz
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(Decoherence; open systems; quantum statistical methods)
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03.67.Mn
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(Entanglement measures, witnesses, and other characterizations)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11404246) and the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2017MF040). |
Corresponding Authors:
Yang Yang
E-mail: yangyang@mail.ustc.edu.cn
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Cite this article:
Yang Yang(杨阳), An-Min Wang(王安民), Lian-Zhen Cao(曹连振), Jia-Qiang Zhao(赵加强), Huai-Xin Lu(逯怀新) Decoherence for a two-qubit system in a spin-chain environment 2018 Chin. Phys. B 27 090302
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