| Quantum Discord in Two-Qubit System Constructed from the Yang–Baxter Equation |
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| 引用本文： | 苟立丹,王晓茜,徐玉梅,孙媛媛.Quantum Discord in Two-Qubit System Constructed from the Yang–Baxter Equation[J].理论物理通讯,2014,61(3):349-353. |
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| 作者姓名： | 苟立丹 王晓茜 徐玉梅 孙媛媛 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos.11247260 and 11305020;the CUST Foundation for Young Scholars under Grant No.XQNJJ-2011-03 |
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| 摘 要： | Quantum correlations among parts of a composite quantum system are a fundamental resource for several applications in quantum information. In general, quantum discord can measure quantum correlations. In that way, we investigate the quantum discord of the two-qubit system constructed from the Yang-Baxter Equation. The density matrix of this system is generated through the unitary Yang-Baxter matrix R. The analytical expression and numerical result of quantum discord and geometric measure of quantum discord are obtained for the Yang-Baxter system. These results show that quantum discord and geometric measure of quantum discord are only connect with the parameter θ, which is the important spectral parameter in Yang Baxter equation.
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| 关 键 词： | 量子比特 系统部件 方程构造 和谐 量子关联 密度矩阵 解析表达式 应用程序 |
| 收稿时间： | 2013-07-10 |
Quantum Discord in Two-Qubit System Constructed from the Yang-Baxter Equation |
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| GOU Li-Dan,WANG Xiao-Qian,XU Yu-Mei,SUN Yuan-Yuan.Quantum Discord in Two-Qubit System Constructed from the Yang-Baxter Equation[J].Communications in Theoretical Physics,2014,61(3):349-353. |
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| Authors: | GOU Li-Dan WANG Xiao-Qian XU Yu-Mei SUN Yuan-Yuan |
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| Institution: | 1. Department of Physics, Changchun University of Science and Technology, Changchun 130022, China;
2. Department of Admissions, Weifang Nursing Vocational College, Weifang 262500, China;
3. Combat Command Department, Aviation University of Air Force, Changchun 130022, China |
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| Abstract: | Quantum correlations among parts of a composite quantum system are a fundamental resource for several applications in quantum information. In general, quantum discord can measure quantum correlations. In that way, we investigate the quantum discord of the two-qubit system constructed from the Yang-Baxter Equation. The density matrix of this system is generated through the unitary Yang-Baxter matrix ?. The analytical expression and numerical result of quantum discord and geometric measure of quantum discord are obtained for the Yang-Baxter system. These results show that quantum discord and geometric measure of quantum discord are only connect with the parameter θ, which is the important spectral parameter in Yang-Baxter equation. |
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| Keywords: | quantum correlations quantum discord Yang-Baxter equation |
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