The European Physical Journal Plus最新文献

Particle in a spherical potential well of energy dependent depth 深度依赖于能量的球形势阱中的粒子

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-04-28 DOI: 10.1140/epjp/s13360-025-06285-1

Radu Budaca

引用次数: 0

Klein-Nishina cross-sections and radiation interaction coefficients of human organs and dosimetric materials for diagnostic and radiation dosimetry applications Klein-Nishina人体器官的横截面和辐射相互作用系数以及用于诊断和辐射剂量测定的剂量测量材料

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-04-28 DOI: 10.1140/epjp/s13360-025-06271-7

Aytaç Levet, Hüseyin Dağ, Mohammed Sultan Al-Buriahi, Mehmet Büyükyıldız

{"title":"Klein-Nishina cross-sections and radiation interaction coefficients of human organs and dosimetric materials for diagnostic and radiation dosimetry applications","authors":"Aytaç Levet, Hüseyin Dağ, Mohammed Sultan Al-Buriahi, Mehmet Büyükyıldız","doi":"10.1140/epjp/s13360-025-06271-7","DOIUrl":"10.1140/epjp/s13360-025-06271-7","url":null,"abstract":"<div><p>X-ray and γ-ray have been frequently used worldwide for different aims such as scans, diagnostic, and therapeutic applications. While these processes occur for the aims, people unintentionally receive various doses of these rays which are highly energetic. Thus, electronic and energy transfer cross-sections, Compton mass attenuation coefficients, Compton mass energy transfer coefficients (CMETC) according to effective charges and charge to atomic weight ratios should be investigated for our health especially organs or dosimetric materials. In the present study, these parameters have been studied using Klein-Nishina approach in the wide energy region. The cross-sections have been firstly calculated in the photon energies. The investigated parameters of the materials have been then determined using the relevant cross-sections and effective atomic numbers in the same energy range. The results were compared with each other and some possible results from the literature. A good agreement was observed for electronic and energy transfer cross-sections (Diff. ≤ 0.16%). In addition, a comparison with the literature was conducted for possible materials at certain photon energies, and maximum difference (%) in soft tissue was observed up to around 33.61% for CMETCs. The reported data should be useful using the gamma rays in medicine and dosimetry applications.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-025-06271-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143879679","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

Dynamical stability of bootstrapped Newtonian stars 自举牛顿恒星的动态稳定性

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-04-26 DOI: 10.1140/epjp/s13360-025-06272-6

Octavian Micu

引用次数: 0

Macroscopic entanglement generation and transfer in a coupled cavity–magnon system via optical parametric amplifier 光参量放大器耦合腔-磁振子系统中宏观纠缠的产生和传递

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-04-25 DOI: 10.1140/epjp/s13360-025-06274-4

Yuan Shun, Zhang Yunpeng, Chang Guohao, Hunduzi Halimjan, Ahmad Abliz

{"title":"Macroscopic entanglement generation and transfer in a coupled cavity–magnon system via optical parametric amplifier","authors":"Yuan Shun, Zhang Yunpeng, Chang Guohao, Hunduzi Halimjan, Ahmad Abliz","doi":"10.1140/epjp/s13360-025-06274-4","DOIUrl":"10.1140/epjp/s13360-025-06274-4","url":null,"abstract":"<div><p>Generation and transfer of quantum entanglement at macroscopic scales are key for advancing quantum information processing and communication. This paper presents a theoretical framework for achieving and transferring bipartite and tripartite entanglement in a coupled cavity–magnon system integrated with an optical parametric amplifier (OPA). The findings indicate that in the four-mode system under study, the nonlinear gain introduced by the OPA facilitates the creation of bipartite entanglement. This bipartite entanglement, produced by two coupled microwave cavities, is driven concurrently by the squeezing effects of the OPA and transferred to two magnons through cavity–magnon coupling. The transfer rate of this entanglement increases with the strength of the linear cavity–magnon coupling and approaches unity. The magnon–magnon entanglement produced can be tuned using parameters such as the cavity–cavity coupling strength, the cavity dissipation rate, and the nonlinear gain coefficient of the OPA. Additionally, this entanglement shows robustness to temperature. Under steady-state conditions, the system achieves tripartite entanglement in both cavity–magnon–cavity and magnon–cavity–magnon configurations, and the OPA nonlinear effects improve the system's resilience to temperature fluctuations.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143871314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reduced-order Bopp-Podolsky model on the null-plane 零平面上的降阶Bopp-Podolsky模型

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-04-25 DOI: 10.1140/epjp/s13360-025-06279-z

Mario Bertin, Ronaldo Thibes

引用次数: 0

Non-Gaussianity and entanglement swapping of two-mode entangled squeezed-coherent state 双模纠缠压缩相干态的非高斯性与纠缠交换

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-04-25 DOI: 10.1140/epjp/s13360-025-06259-3

Shao-Hua Xiang, Yu-Jing Zhao, Zhen-Gang Shi

引用次数: 0

Maximum power point tracking based on improved sliding mode control 基于改进滑模控制的最大功率点跟踪

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-04-25 DOI: 10.1140/epjp/s13360-025-06264-6

Abdelkader Ouacel, Benalia M’hamdi, Tahar Benaissa, Abderrahmane Amari, Matilde Pietrafesa, Mario Versaci

引用次数: 0

Photocontrol of bacterial membrane potential regulates antibiotic persistence in B. subtilis 细菌膜电位的光控调节枯草芽孢杆菌的抗生素持久性

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-04-24 DOI: 10.1140/epjp/s13360-025-06263-7

Pietro Bertolotti, Federico Gallinardi, Marta Ghidoli, Chiara Bertarelli, Guglielmo Lanzani, Giuseppe Maria Paternò

{"title":"Photocontrol of bacterial membrane potential regulates antibiotic persistence in B. subtilis","authors":"Pietro Bertolotti, Federico Gallinardi, Marta Ghidoli, Chiara Bertarelli, Guglielmo Lanzani, Giuseppe Maria Paternò","doi":"10.1140/epjp/s13360-025-06263-7","DOIUrl":"10.1140/epjp/s13360-025-06263-7","url":null,"abstract":"<div><p>Bacterial persistence and resistance to antibiotics pose critical challenges in healthcare and environmental contexts. Recent studies revealing that bacteria possess a dynamic electrical membrane potential open new avenues for influencing bacterial behaviour and drug susceptibility. In this work, we present a novel light-responsive strategy to modulate bacterial antibiotic persistence using Ziapin2, an azobenzene photoswitch previously shown to alter bacterial membrane potential. We selected two broad-spectrum antibiotics with distinct modes of action: Kanamycin, which requires cytosolic uptake to inhibit protein synthesis, and Ampicillin, which targets cell wall polymerization at the cell envelope, to probe the role of membrane potential in antibiotic efficacy. Our findings show that when <i>Bacillus subtilis</i> is exposed to Kanamycin and Ziapin2, photoactivation (470 nm) significantly impacts bacterial viability: under illumination, the previously lethal effects of Kanamycin are markedly reduced, suggesting that membrane potential changes drive altered antibiotic uptake or intracellular accumulation. In contrast, Ampicillin-treated samples remain largely unaffected by light-induced membrane modulation, consistent with its action at the external cell envelope. Taken together, these results indicate that membrane potential manipulation can selectively influence the activity of antibiotics whose intracellular uptake is critical to their function. This proof-of-concept study underscores the potential of non-genetic, light-based interventions to modulate bacterial susceptibility in real time. Future work will expand this approach by exploring additional antibiotic classes and novel azobenzene derivatives, ultimately advancing our understanding of bacterial bioelectric regulation and its applications in antimicrobial therapies.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-025-06263-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865518","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

Curvature-driven acceleration and a notion of vacuum in Nash theory 曲率驱动的加速度和纳什理论中的真空概念

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-04-24 DOI: 10.1140/epjp/s13360-025-06258-4

Soumya Chakrabarti, Soumya Bhattacharya, Rabin Banerjee, Amitabha Lahiri

引用次数: 0

Microbeam irradiation reveals cytoplasmic damage contributes to micronuclei induction 微束辐照显示细胞质损伤有助于微核诱导

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-04-23 DOI: 10.1140/epjp/s13360-025-06265-5

Teruaki Konishi, Jun Wang, Alisa Kobayashi, Cuihua Liu, Yota Hiroyama, Taisei Mamiya, Tamon Kusumoto, Masakazu Oikawa

{"title":"Microbeam irradiation reveals cytoplasmic damage contributes to micronuclei induction","authors":"Teruaki Konishi, Jun Wang, Alisa Kobayashi, Cuihua Liu, Yota Hiroyama, Taisei Mamiya, Tamon Kusumoto, Masakazu Oikawa","doi":"10.1140/epjp/s13360-025-06265-5","DOIUrl":"10.1140/epjp/s13360-025-06265-5","url":null,"abstract":"<div><p>Microbeam technology offers a valuable tool for investigating inter- and intracellular responses to radiation-induced damage. This study investigated the contribution of cytoplasmic irradiation to micronuclei (MN) induction using proton microbeams. Three irradiation conditions were employed: (N) nucleus-only, (C) cytoplasm-only, and (N + C) irradiating both. In N + C, 1000 protons were delivered to the cytoplasm. For both N and N + C, MN induction increased proportionally with nuclear proton dose (Np) within the 0 ≤ Np ≤ 100 range. However, the N + C slope was 2/3 of the N slope. N cells exhibited peak MN induction at 150 protons, while N + C peaked at 300 protons. Cytoplasmic irradiation alone also induced MNs, but with a lower slope and reaching a plateau after Np = 300. These results demonstrate that cytoplasmic damage not only contributes to MN induction but also appears to promote protective cellular responses. This highlights the complex interplay between cellular organelles during radiation exposure and emphasizes the importance of considering cytoplasmic contributions to cellular radioresistance.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0