Decoherence for a two-qubit system in a spin-chain environment

doi:10.1088/1674-1056/27/9/090302

中国物理B ›› 2018, Vol. 27 ›› Issue (9): 90302-090302.doi: 10.1088/1674-1056/27/9/090302

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇下一篇

Decoherence for a two-qubit system in a spin-chain environment

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)

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

收稿日期:2018-04-02 修回日期:2018-06-27 出版日期:2018-09-05 发布日期:2018-09-05
通讯作者: Yang Yang E-mail:yangyang@mail.ustc.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11404246) and the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2017MF040).

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

Received:2018-04-02 Revised:2018-06-27 Online:2018-09-05 Published:2018-09-05
Contact: Yang Yang E-mail:yangyang@mail.ustc.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11404246) and the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2017MF040).

摘要/Abstract

摘要：

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.

关键词: quantum coherence, quantum discord, decoherence

Abstract:

Key words: quantum coherence, quantum discord, decoherence

中图分类号: (Foundations of quantum mechanics; measurement theory)

03.65.Ta

03.65.Yz (Decoherence; open systems; quantum statistical methods) 03.67.Mn (Entanglement measures, witnesses, and other characterizations)

杨阳, 王安民, 曹连振, 赵加强, 逯怀新. Decoherence for a two-qubit system in a spin-chain environment[J]. 中国物理B, 2018, 27(9): 90302-090302.

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[J]. Chin. Phys. B, 2018, 27(9): 90302-090302.

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Decoherence for a two-qubit system in a spin-chain environment

Decoherence for a two-qubit system in a spin-chain environment

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