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Quantum discord and its dynamics for multipartite systems |
| Jiaxin Luo(罗嘉欣) and Qiong Guo(郭琼)† |
| College of Sciences, Shanghai Institute of Technology, Shanghai 201418, China |
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Abstract Quantum discord, one of the famous quantum correlations, has been recently generalized to multipartite systems by Radhakrishnan et al. Here we give analytical solutions of the quantum discord for a family of $N$-qubit quantum states. For the bipartite system, we derive a zero quantum discord which will remain unchanged under the phase damping channel. For multiparitite systems, it is found that the quantum discord can be classified into three categories and the quantum discord for odd-partite systems can exhibit freezing under the phase damping channel, while the freezing does not exist in the even-partite systems.
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Received: 19 February 2024
Revised: 14 March 2024
Accepted manuscript online: 27 March 2024
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PACS:
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03.65.Aa
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(Quantum systems with finite Hilbert space)
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03.67.-a
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(Quantum information)
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03.65.Yz
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(Decoherence; open systems; quantum statistical methods)
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| Fund: This work was partially supported by the National Natural Science Foundation of China (Grant No. 11601338). |
Corresponding Authors:
Qiong Guo
E-mail: qiongguo@sit.edu.cn
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Cite this article:
Jiaxin Luo(罗嘉欣) and Qiong Guo(郭琼) Quantum discord and its dynamics for multipartite systems 2024 Chin. Phys. B 33 060303
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