Buz - ek-Hillery复印机的坚固性

IF 2.3 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Physics Letters A Pub Date : 2025-05-12 DOI:10.1016/j.physleta.2025.130633

A.R. Mohammed , N. Metwally

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引用次数: 0

摘要

在这项工作中，我们研究了Bužek-Hillery （BH）量子复制机在Dzyaloshinskii-Moriya （DM）相互作用下对各向同性和非各向同性系统的鲁棒性。为此，我们分析了在不同交互参数下复制状态及其局部信息的时间演化。研究结果表明，通过优化初始状态设置和相互作用参数，可以提高复制过程的效率，达到95%以上的保真度。当初始状态对量子信息进行编码时，可以实现所预测的稳态保真度。此外，我们的结果表明，与各向同性系统相比，非各向同性系统中最大保真度和局部信息的潜力更大。

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The robustness of the Buz̆ek-Hillery copy machine

In this work, we investigate the robustness of the Bužek-Hillery (BH) quantum copying machine for isotropic and non-isotropic systems in the presence of Dzyaloshinskii–Moriya (DM) interaction. To this end, we analyze the time evolution of the copied state and its local information under varying interaction parameters. Our findings reveal that the efficiency of the copying process can be enhanced, achieving a fidelity exceeding 95% by optimizing the initial state settings and the interaction parameters. The predicted stationary fidelity is attainable when the initial states encode quantum information. Additionally, our results indicate that the potential for maximizing fidelity and local information is greater in non-isotropic systems compared to isotropic ones.

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来源期刊

Physics Letters A 物理-物理：综合

CiteScore

5.10

自引率

3.80%

发文量

493

审稿时长

30 days

期刊介绍： Physics Letters A offers an exciting publication outlet for novel and frontier physics. It encourages the submission of new research on: condensed matter physics, theoretical physics, nonlinear science, statistical physics, mathematical and computational physics, general and cross-disciplinary physics (including foundations), atomic, molecular and cluster physics, plasma and fluid physics, optical physics, biological physics and nanoscience. No articles on High Energy and Nuclear Physics are published in Physics Letters A. The journal''s high standard and wide dissemination ensures a broad readership amongst the physics community. Rapid publication times and flexible length restrictions give Physics Letters A the edge over other journals in the field.