Frozen discord for three qubits in a non-Markovian dephasing channel

被引：0
|
作者：
Hou, Xi-Wen [1 ]
机构：
[1] Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China
来源：
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2024年 / 646卷
关键词：
Quantum discord; Entanglement; Three qubits; Non-Markovian channel; ENTANGLEMENT MEASURES; THERMAL QUANTUM; STATE;
D O I：
10.1016/j.physa.2024.129884
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The analytic form of quantum discord by Radhakrishnan et al. (2020) is derived for three qubits under a non-Markovian dephasing channel, where tripartite entanglement is explicitly calculated for reference. The necessary and sufficient conditions for the frozen discord are presented. It is shown that tripartite discord can exhibit multiple intervals of freezing under such conditions, while the entanglement displays multiply sudden deaths and revivals.
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页数：7
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