两个超导电荷量子位的时间分数演化

IF 5.6 1区 数学 Q1 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS
Abdessamie Chhieb , Mansoura Oumennana , Mostafa Mansour
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引用次数: 0

摘要

我们研究了两个超导电荷量子比特(TSC-Q)之间的量子相关动力学,由时间分数Schrödinger方程(TFSE)控制,这是一个包含由环境相互作用引起的非马尔可夫记忆效应的框架。通过分析可分离初始态和部分纠缠初始态,我们强调了分数阶τ、约瑟夫森能量(EJ1、EJ2)和耦合强度(Em)在调制并发性、量子转向不对称性和贝尔非局域性(通过CHSH不等式)中的核心作用。我们的研究结果表明,τ值的降低促进了可分离态和部分纠缠态的量子关联的更快产生,突出了τ作为量子资源催化剂和稳定器的双重作用。此外,值得注意的是,当两个量子位元的约瑟夫森能量接近时,即当EJ2≈EJ1时,可以观察到量子相关的最佳行为。此外,更强的耦合强度(Em)进一步增强了这些相关性的产生。τ、EJ1、EJ2和Em之间的协同作用定义了一个可调的参数空间,用于设计记忆驱动的相关性,以减轻退相干。这些结果将TFSE定位为超导体系结构中非马尔可夫动力学建模的有前途的工具,为具有增强相关性的鲁棒量子平台铺平了道路,适用于可扩展的量子计算和安全通信系统。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Time fractional evolution of two superconducting charge qubits
We investigate the quantum correlation dynamics between two superconducting charge qubits (TSC-Q), governed by the time-fractional Schrödinger equation (TFSE), a framework incorporating non-Markovian memory effects arising from environmental interactions. By analyzing separable and partially entangled initial states, we highlight the central role of the fractional order τ, Josephson energies (EJ1, EJ2), and coupling strength (Em) in modulating concurrence, quantum steering asymmetry, and Bell nonlocality (via the CHSH inequality). Our results indicate that a decrease in the value of τ promotes a faster generation of quantum correlations for separable and partially entangled states, highlighting the dual role of τ as both a catalyst and a stabilizer of quantum resources. Furthermore, it is important to note that optimal behavior of quantum correlations is observed when the Josephson energies of the two qubits are close, i.e., when EJ2EJ1. In addition, a stronger coupling strength, denoted by Em, further enhances the generation of these correlations. The synergy among τ, EJ1, EJ2, and Em defines a tunable parameter space for engineering memory-driven correlations to mitigate decoherence. These results position the TFSE as a promising tool for modeling non-Markovian dynamics in superconducting architectures, paving the way for robust quantum platforms with enhanced correlations, suitable for scalable quantum computing and secure communication systems.
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来源期刊
Chaos Solitons & Fractals
Chaos Solitons & Fractals 物理-数学跨学科应用
CiteScore
13.20
自引率
10.30%
发文量
1087
审稿时长
9 months
期刊介绍: Chaos, Solitons & Fractals strives to establish itself as a premier journal in the interdisciplinary realm of Nonlinear Science, Non-equilibrium, and Complex Phenomena. It welcomes submissions covering a broad spectrum of topics within this field, including dynamics, non-equilibrium processes in physics, chemistry, and geophysics, complex matter and networks, mathematical models, computational biology, applications to quantum and mesoscopic phenomena, fluctuations and random processes, self-organization, and social phenomena.
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