Stark-shift impact on quantum teleportation performance using a two two-level atom-cavity system as a resource

IF 2 3区物理与天体物理 Q3 OPTICS

Applied Physics B Pub Date : 2025-08-09 DOI:10.1007/s00340-025-08530-y

S. Boulifa, A. Slaoui, H. El Hadfi, R. Ahl Laamara

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Abstract

In this work, we present a precise mathematical solution that explains how two two-level atoms interact with a multiphoton electromagnetic field inside a single-mode cavity, while specifically considering the Stark shift effect. The system is initialized with the field in a coherent state and both atoms in their excited states. The resulting model incorporates the changes in atomic energy levels induced by the Stark shift and serves as a transmission channel for the quantum teleportation of a bipartite state. Our study focuses on the combined influence of the Stark shift and photon number on teleportation fidelity and the preservation of quantum resources such as entanglement and coherence. The results reveal the existence of critical thresholds for these two parameters, below which the quality of teleportation degrades significantly. Additionally, we analyze the impact of these parameters on the Quantum Fisher Information (QFI), a key quantity for assessing the accuracy of parameter estimation after teleportation. A direct comparison between QFI and the Hilbert-Schmidt speed is also conducted to better understand the latter’s role in quantum estimation tasks.

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利用两个二能级原子-腔系统作为资源，Stark-shift对量子隐形传态性能的影响

在这项工作中，我们提出了一个精确的数学解决方案，解释了两个两能级原子如何在单模腔内与多光子电磁场相互作用，同时特别考虑了斯塔克位移效应。系统初始化时，场处于相干态，两个原子都处于激发态。由此产生的模型包含了斯塔克位移引起的原子能级变化，并作为二部态量子隐形传态的传输通道。研究了斯塔克位移和光子数对隐形传态保真度和量子纠缠、相干等量子资源保存的综合影响。结果表明，这两个参数存在临界阈值，低于该阈值，隐形传态的质量显著下降。此外，我们还分析了这些参数对量子费雪信息（QFI）的影响，QFI是评估隐形传态后参数估计准确性的关键量。QFI和希尔伯特-施密特速度之间的直接比较也被进行，以更好地理解后者在量子估计任务中的作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics B 物理-光学

CiteScore

4.00

自引率

4.80%

发文量

202

审稿时长

3.0 months

期刊介绍： Features publication of experimental and theoretical investigations in applied physics Offers invited reviews in addition to regular papers Coverage includes laser physics, linear and nonlinear optics, ultrafast phenomena, photonic devices, optical and laser materials, quantum optics, laser spectroscopy of atoms, molecules and clusters, and more 94% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again Publishing essential research results in two of the most important areas of applied physics, both Applied Physics sections figure among the top most cited journals in this field. In addition to regular papers Applied Physics B: Lasers and Optics features invited reviews. Fields of topical interest are covered by feature issues. The journal also includes a rapid communication section for the speedy publication of important and particularly interesting results.