Distribution dynamics of fisher and Wigner–Yanase information correlations of two qubits coupled to an open superconducting cavity

IF 1.5 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Modern Physics Letters A Pub Date : 2023-11-04 DOI:10.1142/s0217732323501511
F. M. Aldosari, A.-B. A. Mohamed, A. Rahman, M. Hashem
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Abstract

In this paper, we explore distribution dynamics of two-qubit Fisher and skew information correlations of a dissipative microwave cavity field interacting with two charged superconducting qubits. Besides the negativity function, non-classical correlations beyond entanglement are studied using local quantum Fisher information (LQFI) and local quantum uncertainty (LQU). We find that the two-qubit non-classical correlations are sensitive to qubit–qubit distribution angle, two-qubit dissipation parameter, and initial coherent state intensity. The phenomena of frozen quantum correlations, sudden death or birth, as well as revival dynamical maps are feasible in the current two-qubit state when exposed to a microwave cavity. The non-classical correlations and entanglement have been found damped under the two-qubit dissipation appearance in the field. For the increasing strength of coherence intensity of the field, the two-qubit non-classical correlations functions remain to emerge quickly and oscillate with higher frequency, although with the least amplitudes. Interestingly, unlike the non-classical correlations, negativity does not emerge against higher coherence strengths of the cavity and remains completely zero. Finally, for the least dissipation and higher coherence strength, one can readily generate non-classical two-qubit states employing a microwave cavity.
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两个量子比特耦合到开放超导腔的fisher和Wigner-Yanase信息相关的分布动力学
在本文中,我们探索了两个量子比特的Fisher分布动力学和与两个带电超导量子比特相互作用的耗散微波腔场的歪斜信息相关。除负函数外,还利用局部量子费雪信息(LQFI)和局部量子不确定性(LQU)研究了超越纠缠的非经典相关。我们发现双量子位非经典相关对量子位-量子位分布角、双量子位耗散参数和初始相干态强度都很敏感。当暴露于微波腔中时,在当前的双量子比特状态下,冻结量子相关、突然死亡或突然出生以及复兴动力学映射现象是可行的。在双量子位耗散的情况下,非经典相关和纠缠被抑制。随着场相干强度的增加,双量子位非经典相关函数仍然快速出现,振荡频率更高,但振幅最小。有趣的是,与非经典相关不同的是,在高相干强度的空腔中,负性不会出现,并且完全保持为零。最后,为了最小的耗散和更高的相干强度,我们可以很容易地利用微波腔产生非经典的双量子位态。
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来源期刊
Modern Physics Letters A
Modern Physics Letters A 物理-物理:核物理
CiteScore
3.10
自引率
7.10%
发文量
186
审稿时长
3 months
期刊介绍: This letters journal, launched in 1986, consists of research papers covering current research developments in Gravitation, Cosmology, Astrophysics, Nuclear Physics, Particles and Fields, Accelerator physics, and Quantum Information. A Brief Review section has also been initiated with the purpose of publishing short reports on the latest experimental findings and urgent new theoretical developments.
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