Dakir Yassine, Slaoui Abdallah, Mohamed Abdel-Baset A, Laamara Rachid Ahl, Eleuch Hichem
LPHE-Modeling and Simulation, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco.
Centre of Physics and Mathematics, CPM, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco.
Sci Rep. 2023 Nov 22;13(1):20526. doi: 10.1038/s41598-023-46396-2.
We investigate the dynamics of non-classical correlations and quantum coherence in open quantum systems by employing metrics like local quantum Fisher information, local quantum uncertainty, and quantum Jensen-Shannon divergence. Our focus here is on a system of two qubits in two distinct physical situations: the first one when the two qubits are coupled to a cavity field whether the system is closed or open, while the second consists of two qubits immersed in dephasing reservoirs. Our study places significant emphasis on how the evolution of these quantum criterion is influenced by the initial state's purity (whether pure or mixed) and the nature of the environment (whether Markovian or non-Markovian). We observe that a decrease in the initial state's purity corresponds to a reduction in both quantum correlations and quantum coherence, whereas higher purity enhances these quantumness. Furthermore, we establish a quantum teleportation strategy based on the two different physical scenarios. In this approach, the resulting state of the two qubits functions as a quantum channel integrated into a quantum teleportation protocol. We also analyze how the purity of the initial state and the Markovian or non-Markovian regimes impact the quantum teleportation process.
我们通过采用局部量子费希尔信息、局部量子不确定性和量子詹森 - 香农散度等度量来研究开放量子系统中非经典关联和量子相干的动力学。我们这里关注的是处于两种不同物理情形下的两个量子比特的系统：第一种情形是两个量子比特耦合到一个腔场，无论系统是封闭的还是开放的；而第二种情形是两个量子比特浸没在退相干库中。我们的研究重点在于这些量子判据的演化如何受到初始态纯度（纯态或混合态）以及环境性质（马尔可夫或非马尔可夫）的影响。我们观察到初始态纯度的降低对应于量子关联和量子相干的减少，而更高的纯度会增强这些量子特性。此外，我们基于这两种不同的物理场景建立了一种量子隐形传态策略。在这种方法中，两个量子比特的最终态充当集成到量子隐形传态协议中的量子通道。我们还分析了初始态的纯度以及马尔可夫或非马尔可夫区域如何影响量子隐形传态过程。
