Long-time protection of thermal correlations in a hybrid-spin system under random telegraph noise,Physical Review E

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Long-time protection of thermal correlations in a hybrid-spin system under random telegraph noise
Physical Review E ( IF 2.2 ) Pub Date : 2022-09-15 , DOI: 10.1103/physreve.106.034122
Fadwa Benabdallah ₁ , Atta Ur Rahman ₂ , Saeed Haddadi _{3,

4} , Mohammed Daoud _{5,

6}

Affiliation

The engineering features of transmitting mediums and their impact on different characteristics of a quantum system play a significant role in the efficient performance of nonlocal protocols. For this purpose, the dynamics of open quantum systems and coupling mediums remain a pathway. In this work, we investigate the dynamics of quantum correlations using negativity, uncertainty-induced nonlocality, and local quantum Fisher information in a hybrid qubit-qutrit thermal state when coupled with a magnetic field and influenced by random telegraph noise. Different features of the system parameters are taken into account while designing longer preservation of qubit-qutrit correlations. We show that the temperature has an inverse impact on the initial values of negativity, uncertainty-induced nonlocality, and local quantum Fisher information. When the magnetic field is characterized by different features, the entanglement, nonlocality, and Fisher information show a variety of dynamical maps, assuring their distinct nature. In addition, the qubit-qutrit correlations undergo repeated revivals when the configuration is restricted to the non-Markovian regime. On the other hand, an exponential drop with a single minimum is observed in the Markovian regime of the coupled field. Most importantly, our findings reveal that the present coupled fields have several advantages that can be leveraged to generate the optimal degree of entanglement, nonlocality, and local quantum Fisher information preservation in quantum dynamical maps.

中文翻译：

随机电报噪声下混合自旋系统热相关性的长期保护

传输介质的工程特性及其对量子系统不同特性的影响在非本地协议的有效性能中起着重要作用。为此，开放量子系统和耦合介质的动力学仍然是一条途径。在这项工作中，我们在与磁场耦合并受随机电报噪声影响时，在混合量子比特-qutrit 热态中使用负性、不确定性引起的非定域性和局部量子 Fisher 信息来研究量子相关性的动力学。在设计 qubit-qutrit 相关性的更长时间保存时，会考虑系统参数的不同特征。我们表明，温度对负性、不确定性引起的非定域性和局部量子 Fisher 信息的初始值有反向影响。当磁场具有不同的特征时，纠缠、非定域性和 Fisher 信息显示出各种动态图，确保了它们独特的性质。此外，当配置受限于非马尔可夫机制时，qubit-qutrit 相关性会反复恢复。另一方面，在耦合场的马尔可夫机制中观察到具有单个最小值的指数下降。最重要的是，我们的研究结果表明，目前的耦合场具有几个优点，可用于在量子动力学图中生成最佳纠缠度、非定域性和局部量子 Fisher 信息保存。确保其独特的性质。此外，当配置受限于非马尔可夫机制时，qubit-qutrit 相关性会反复恢复。另一方面，在耦合场的马尔可夫机制中观察到具有单个最小值的指数下降。最重要的是，我们的研究结果表明，目前的耦合场具有几个优点，可用于在量子动力学图中生成最佳纠缠度、非定域性和局部量子 Fisher 信息保存。确保其独特的性质。此外，当配置受限于非马尔可夫机制时，qubit-qutrit 相关性会反复恢复。另一方面，在耦合场的马尔可夫机制中观察到具有单个最小值的指数下降。最重要的是，我们的研究结果表明，目前的耦合场具有几个优点，可用于在量子动力学图中生成最佳纠缠度、非定域性和局部量子 Fisher 信息保存。

更新日期：2022-09-15

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