Analytic Expression of Quantum Discords in Werner States under LQCC
In this paper, quantum discords in a special kind of states, i.e., Werner states by local quantum operations and classical communication (LQCC) protocols (WLQCC states), are studied. Nineteen parameters to quantify the quantum discords are reduced to four parameters in terms of properties of Werner...
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| Format: | Article |
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MDPI AG
2020-01-01
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| Series: | Entropy |
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| Online Access: | https://www.mdpi.com/1099-4300/22/2/147 |
| _version_ | 1798024240397549568 |
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| author | Chuanmei Xie Zhanjun Zhang Jianlan Chen Xiaofeng Yin |
| author_facet | Chuanmei Xie Zhanjun Zhang Jianlan Chen Xiaofeng Yin |
| author_sort | Chuanmei Xie |
| collection | DOAJ |
| description | In this paper, quantum discords in a special kind of states, i.e., Werner states by local quantum operations and classical communication (LQCC) protocols (WLQCC states), are studied. Nineteen parameters to quantify the quantum discords are reduced to four parameters in terms of properties of Werner states and quantum discord. In the case of orthogonal projective measures, analytic expression of quantum discords in WLQCC states is analytically worked out. Some properties of the quantum discord in the WLQCC states are obtained, especially the variation relations between the quantum discords and the parameters characterizing the WLQCC states. By virtue of numerical computations, quantum discords in a Werner state before and after LQCC protocols are compared. It is found that quantum discord in any WLQCC state cannot exceed that in the original Werner state. |
| first_indexed | 2024-04-11T17:59:13Z |
| format | Article |
| id | doaj.art-e87336fffe194c968b32375ec301af6f |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-04-11T17:59:13Z |
| publishDate | 2020-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-e87336fffe194c968b32375ec301af6f2022-12-22T04:10:35ZengMDPI AGEntropy1099-43002020-01-0122214710.3390/e22020147e22020147Analytic Expression of Quantum Discords in Werner States under LQCCChuanmei Xie0Zhanjun Zhang1Jianlan Chen2Xiaofeng Yin3School of Physics & Material Science, Anhui University, Hefei 230039, ChinaSchool of Information and Electronic Engineering, Zhejiang Gongshang University, Hangzhou 310018, ChinaSchool of Physics & Material Science, Anhui University, Hefei 230039, ChinaSchool of Physics & Material Science, Anhui University, Hefei 230039, ChinaIn this paper, quantum discords in a special kind of states, i.e., Werner states by local quantum operations and classical communication (LQCC) protocols (WLQCC states), are studied. Nineteen parameters to quantify the quantum discords are reduced to four parameters in terms of properties of Werner states and quantum discord. In the case of orthogonal projective measures, analytic expression of quantum discords in WLQCC states is analytically worked out. Some properties of the quantum discord in the WLQCC states are obtained, especially the variation relations between the quantum discords and the parameters characterizing the WLQCC states. By virtue of numerical computations, quantum discords in a Werner state before and after LQCC protocols are compared. It is found that quantum discord in any WLQCC state cannot exceed that in the original Werner state.https://www.mdpi.com/1099-4300/22/2/147local quantum operations and classical communication (lqcc)werner state under lqccquantum discordanalytical expression of quantum discord |
| spellingShingle | Chuanmei Xie Zhanjun Zhang Jianlan Chen Xiaofeng Yin Analytic Expression of Quantum Discords in Werner States under LQCC Entropy local quantum operations and classical communication (lqcc) werner state under lqcc quantum discord analytical expression of quantum discord |
| title | Analytic Expression of Quantum Discords in Werner States under LQCC |
| title_full | Analytic Expression of Quantum Discords in Werner States under LQCC |
| title_fullStr | Analytic Expression of Quantum Discords in Werner States under LQCC |
| title_full_unstemmed | Analytic Expression of Quantum Discords in Werner States under LQCC |
| title_short | Analytic Expression of Quantum Discords in Werner States under LQCC |
| title_sort | analytic expression of quantum discords in werner states under lqcc |
| topic | local quantum operations and classical communication (lqcc) werner state under lqcc quantum discord analytical expression of quantum discord |
| url | https://www.mdpi.com/1099-4300/22/2/147 |
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