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Non-classicality of two superconducting-qubits interacting independently with a resonator cavity: trace-norm correlation and Bures-distance entanglement
Journal of Modern Optics ( IF 1.2 ) Pub Date : 2021-01-20 , DOI: 10.1080/09500340.2021.1872726
A.-B. A. Mohamed 1, 2 , H. A. Hessian 2, 3
Affiliation  

We study the behaviour of the correlation robustness of two spatially isolated charge-qubits started initially with a maximally correlated nonsymmetric Bell-state. Each charged qubit is coupled individually to a superconducting resonator coherent field. The dynamics of the qubit-resonator quantum correlations, based on trace-norm measurement-induced non-locality (MIN) and Bures distance entanglement, are investigated under the effects of the qubit-resonator interactions, intrinsic decoherence, initial coherent intensity cavity as well as of the qubit-resonator detuning. It is found that the trace-norm MIN correlation can be enhanced by the initial coherent field intensity and the detuning. The MIN is more robust, against the qubit-resonator interactions and the decoherence, than the Bures distance entanglement. Furthermore, the correlation robustness analysed for the different cases of the coherent states depends not only on the intrinsic decoherence but also on the coherent states and the qubit-resonator detuning.



中文翻译:

与谐振腔独立相互作用的两个超导量子位的非经典性:迹线范数相关性和布尔距离纠缠

我们研究了两个空间隔离的电荷量子位的相关鲁棒性的行为,它们最初以最大相关的非对称贝尔状态开始。每个带电的量子比特分别耦合到超导谐振器相干场。在量子位-谐振子相互作用,内在退相干,初始相干强度腔以及效应的影响下,研究了基于痕量范数测量引起的非局部性(MIN)和Bures距离纠缠的量子位-谐振子量子相关动力学。从量子位谐振器失谐开始。发现通过初始相干场强度和失谐可以增强迹线最小MIN相关性。相对于Bures距离纠缠,MIN具有更强的抵抗量子比特-谐振器相互作用和去相干的能力。此外,

更新日期:2021-02-09
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