Applied Physics B最新文献_第8页

Temperature-compensated magnetic field sensor based on hollow core bragg fiber fabry-perot interferometer 基于空芯布喇格光纤法布里-珀罗干涉仪的温度补偿磁场传感器

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-02-20 DOI: 10.1007/s00340-025-08417-y

Xiaolu Chen, Shengnan Wu, Nan Li, Xiaokun Qian, Liu Liu, Sailing He

引用次数: 0

A flow field informed optimization scheme for airborne quantum key distribution with boundary layer effects 考虑边界层效应的机载量子密钥分配流场优化方案

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-02-20 DOI: 10.1007/s00340-025-08421-2

Zhi-Feng Deng, Hui-Cun Yu, Hao-Ran Hu, Jie Tang, Jia-Hao Li, Yue-Xiang Cao, Ya Wang, Ying Liu, Dan Wu, Xing-Yu Wang, Lei Shi

{"title":"A flow field informed optimization scheme for airborne quantum key distribution with boundary layer effects","authors":"Zhi-Feng Deng, Hui-Cun Yu, Hao-Ran Hu, Jie Tang, Jia-Hao Li, Yue-Xiang Cao, Ya Wang, Ying Liu, Dan Wu, Xing-Yu Wang, Lei Shi","doi":"10.1007/s00340-025-08421-2","DOIUrl":"10.1007/s00340-025-08421-2","url":null,"abstract":"<div>The performance of QKD systems in airborne environments is significantly hindered by optical distortions and perturbations caused by the boundary layer around high-speed aircraft. This paper proposes an optimization scheme to enhance airborne QKD system performance by analyzing the flow field around the transmitter and strategically positioning it under specific flow conditions. Using ray tracing and two distinct airborne QKD models, we evaluate system performance across various installation positions. Our results show that the largest beam deflection occurs when the transmitter is placed at the center of the wing in air-to-ground scenarios, while the QBER remains consistent across different wing positions, indicating minimal boundary layer effects on QBER. In air-to-air scenarios, optimizing the quantum source placement reduces the photon offset by 6.3 m, with QBER consistently measured at 6% ± 1% across wing positions. These findings offer critical insights for the design and deployment of QKD systems in practical airborne applications.</div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-025-08421-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An efficient image encryption algorithm based on a time-delay predator–prey model 一种基于时滞捕食者-猎物模型的高效图像加密算法

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-02-19 DOI: 10.1007/s00340-025-08412-3

Jian Wang, Haixiao Wang, Jialin Chen, Wenjing Jiang, Runqiao Peng, Junseok Kim

{"title":"An efficient image encryption algorithm based on a time-delay predator–prey model","authors":"Jian Wang, Haixiao Wang, Jialin Chen, Wenjing Jiang, Runqiao Peng, Junseok Kim","doi":"10.1007/s00340-025-08412-3","DOIUrl":"10.1007/s00340-025-08412-3","url":null,"abstract":"<div>An image encryption algorithm enhances the security of an image by transforming its content into a scrambled format. This process employs mathematical techniques, including chaos theory, permutation, and diffusion, to prevent unauthorized access or tampering. To improve the security of images during transmission, we introduce an efficient and innovative image encryption algorithm based on a time-delay predator–prey model, integrating principles from ecological dynamics into cryptography. By appropriately selecting parameters of the proposed predator–prey model, chaotic phenomena are generated. We use these chaotic sequences for image encryption and combine them with the Arnold scrambling algorithm to rearrange pixel positions within the image. Additionally, a diffusion algorithm is employed to alter pixel values, achieving the encryption effect. Various experimental analyses, such as initial value sensitivity, histogram analysis, adjacent pixel correlation, and overall robustness evaluations, are conducted. The computational experiments indicate that the chaotic sequence generated by the proposed predator–prey model can effectively implement image encryption with a favorable encryption effect. We present the results of the model on the best Number of Pixel Change Rate (NPCR) and Unified Average Change Intensity (UACI) scores for various selected test images. In the end, the average NPCR and average UACI are 99.6067% and 33.4687% respectively. We also calculated the value of the information entropy indicator, which reaches 7.9986. Through these empirical validations, the numerical results highlight the robustness and viability of using chaotic sequences in the context of image encryption, offering promising prospects for enhancing data security in digital transmission systems.</div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-025-08412-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of temperature dependence of Fe:ZnSe laser output properties under semi-longitudinal excitation by 2.94 and (sim)4.04 ({upmu })m radiation 2.94和(sim) 4.04 ({upmu }) m辐射半纵向激发下Fe:ZnSe激光器输出特性的温度依赖性比较

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-02-19 DOI: 10.1007/s00340-025-08383-5

Adam Říha, Helena Jelínková, Maxim E. Doroshenko, Michal Němec, Jan Šulc, David Vyhlídal, Dimitriy V. Badikov

{"title":"Comparison of temperature dependence of Fe:ZnSe laser output properties under semi-longitudinal excitation by 2.94 and (sim)4.04 ({upmu })m radiation","authors":"Adam Říha, Helena Jelínková, Maxim E. Doroshenko, Michal Němec, Jan Šulc, David Vyhlídal, Dimitriy V. Badikov","doi":"10.1007/s00340-025-08383-5","DOIUrl":"10.1007/s00340-025-08383-5","url":null,"abstract":"<div>The temperature dependence of the laser output properties of the Fe:ZnSe single crystal was compared under its excitation by 2.94 ({upmu })m Q-switched Er:YAG laser radiation and by (sim)4.04 ({upmu })m gain-switched second Fe:ZnSe laser radiation within the same semi-longitudinal configuration. A non-selective laser cavity consisted of a flat highly reflective mirror at (sim)4–5 ({upmu })m and a concave (r = 200 mm) output coupler with a reflectivity of 88% at (sim)3.9(-)5.3 ({upmu })m. To keep the energy at both excitation wavelengths the same of (sim)9.4 mJ, a special filters were used for attenuation of 2.94 ({upmu })m radiation. The output energy almost doubled since the angle between pumping and generated laser radiation was reduced from (sim)20(^{circ }) to (sim)12(^{circ }). The generated laser oscillation wavelength was shifted by (sim)100 nm in the case of (sim)4.04 ({upmu })m compared to excitation by 2.94 ({upmu })m radiation. The maximum laser output energy of (sim)1.7 mJ under 2.94 ({upmu })m excitation was obtained at 78 K. However, at (sim)4.04 ({upmu })m pumping, the maximum of (sim)0.5 mJ was obtained at 260 K. The efficiency at 2.94 ({upmu })m excitation decreased from (sim)33% at 78 K to (sim)12% at 340 K. At (sim)4.04 ({upmu })m radiation excitation, the efficiency increased from the laser threshold at 120 K to its maximum of (sim)9% at 260 K.</div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-025-08383-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing robustness of quantum states under correlated noisy channels 增强相关噪声信道下量子态的鲁棒性

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-02-18 DOI: 10.1007/s00340-025-08416-z

Natasha Awasthi