IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-07-30 DOI: 10.1088/2058-9565/adf004

Phila Rembold, Santiago Beltrán-Romero, Alexander Preimesberger, Sergei Bogdanov, Isobel C Bicket, Nicolai Friis, Elizabeth Agudelo, Dennis Rätzel and Philipp Haslinger

{"title":"State-agnostic approach to certifying electron–photon entanglement in electron microscopy","authors":"Phila Rembold, Santiago Beltrán-Romero, Alexander Preimesberger, Sergei Bogdanov, Isobel C Bicket, Nicolai Friis, Elizabeth Agudelo, Dennis Rätzel and Philipp Haslinger","doi":"10.1088/2058-9565/adf004","DOIUrl":"https://doi.org/10.1088/2058-9565/adf004","url":null,"abstract":"Transmission electron microscopes (TEMs) enable atomic-scale imaging and characterisation, driving advances across fields from materials science to biology. Quantum correlations, specifically entanglement, may provide a basis for novel hybrid sensing techniques to make TEMs compatible with sensitive samples prone to radiation damage. We present a protocol to certify entanglement between electrons and photons naturally arising from certain coherent cathodoluminescence processes. Using mutually unbiased bases in position and momentum, our method allows robust, state-agnostic entanglement verification and provides a lower bound on the entanglement of formation, enabling quantitative comparisons across platforms. Simulations under experiment-inspired conditions and preliminary experimental data highlight the feasibility of implementing this approach in modern TEM systems with optical specimen access. Our work integrates photonic quantum information techniques with electron microscopy. It establishes a foundation for entanglement-based imaging at the atomic scale, offering a potential pathway to reduce radiation exposure.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"14 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144747175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Free hyperboloidal evolution of the Einstein–Maxwell–Klein–Gordon system 爱因斯坦-麦克斯韦-克莱因-戈登系统的自由双曲演化

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-07-30 DOI: 10.1088/1361-6382/adf0b9

João D Álvares and Alex Vaño-Viñuales

引用次数: 0

Axion stabilization in modular cosmology 模宇宙学中的轴子稳定

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-07-30 DOI: 10.1088/1475-7516/2025/07/090

John Joseph Carrasco, Renata Kallosh, Andrei Linde and Diederik Roest

引用次数: 0

Tidal dissipation within Earth’s solidifying magma ocean: III. Effects of matrix compaction 地球凝固岩浆海洋中的潮汐耗散：3。基质压实效应

IF 3 2区物理与天体物理

Icarus Pub Date : 2025-07-30 DOI: 10.1016/j.icarus.2025.116759

Jun Korenaga

引用次数: 0

The IBM description of the b(E2) anomaly: Dynamical triaxiality and configuration mixing IBM对b（E2）异常的描述：动态三轴性和配置混合

IF 2.5 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-07-30 DOI: 10.1016/j.nuclphysa.2025.123214

Wei Teng, Sheng Nan Wang, Xian Zhi Zhao, Yu Zhang

引用次数: 0

Advancing motor imagery EEG classification by quantum feature integration and quantum support vector machines 基于量子特征集成和量子支持向量机的运动意象脑电分类

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-07-30 DOI: 10.1016/j.apacoust.2025.110976

Rajveer Singh Lalawat , Varun Bajaj , Prabin Kumar Padhy , Chun-Yu Lin

{"title":"Advancing motor imagery EEG classification by quantum feature integration and quantum support vector machines","authors":"Rajveer Singh Lalawat , Varun Bajaj , Prabin Kumar Padhy , Chun-Yu Lin","doi":"10.1016/j.apacoust.2025.110976","DOIUrl":"10.1016/j.apacoust.2025.110976","url":null,"abstract":"<div><div>An advanced approach is presented in the article to classifying motor-imagery (MI) EEG signals. The process begins with identifying the three most significant EEG channels using sequential feature selection (SFS), followed by post-processing using a 5th-order Butterworth bandpass filter. Variational Mode Decomposition (VMD) is then employed to extract features, including statistical metrics and power spectral density (PSD) values across various frequency ranges from the filtered data. Subsequently, a quantum-inspired genetic algorithm (QGA) is applied to optimize the selection of features, exploring more diverse subsets of features to improve the accuracy of the classification. The refined features are then used to train a quantum support vector machine (QSVM), with performance compared to conventional SVM and XGBoost, a tree-based classifier. Our experiments demonstrate that state-of-the-art signal processing techniques combined with quantum algorithms enhance the EEG signal analysis. Specifically, QSVM offers comparable classification accuracy with less data than classical approaches. This innovative method provides new perspectives and opportunities for identifying neurological disorders through advanced instruments, further advancing brain-computer interface (BCI) research.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"240 ","pages":"Article 110976"},"PeriodicalIF":3.4,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Minimal influence of interfacial magnetic anisotropy on the anomalous Nernst effect 界面磁各向异性对反常能思特效应的影响极小

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-07-30 DOI: 10.1063/5.0277555

Seyeob Jeong, Yubin Ji, Seungmo Yang, Tae-Seong Ju, Chanyong Hwang, Albert Min Gyu Park, Kab-Jin Kim

{"title":"Minimal influence of interfacial magnetic anisotropy on the anomalous Nernst effect","authors":"Seyeob Jeong, Yubin Ji, Seungmo Yang, Tae-Seong Ju, Chanyong Hwang, Albert Min Gyu Park, Kab-Jin Kim","doi":"10.1063/5.0277555","DOIUrl":"https://doi.org/10.1063/5.0277555","url":null,"abstract":"The anomalous Nernst effect (ANE) plays a crucial role in thermoelectric energy conversion. Recent studies have suggested that ANE can be enhanced by increasing magnetic anisotropy, based on investigations of ferromagnetic alloys such as FePt, FePd, and MnGa, which possess varying degrees of magnetic anisotropy. Moreover, it has been reported that interfacial effects can also significantly influence the ANE. However, these materials differ not only in anisotropy but also in other intrinsic properties, leaving it unclear whether uniaxial magnetic anisotropy alone plays a decisive role in enhancing ANE. To isolate the effect of magnetic anisotropy, we studied MgO/Ta/CoFeB/W thin films, where voltage-controlled magnetic anisotropy enables modulation of magnetic anisotropy without altering other material characteristics. Despite a 30% reduction in magnetic anisotropy, we observed less than a 3% change in ANE, indicating a weak correlation. These findings suggest that magnetic anisotropy alone is not a critical factor governing the ANE, and that the ANE remains robust in voltage-tuned devices.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":"17 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144747105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Wide bandgap perovskite photovoltaic on rigid and flexible substrates for indoor light harvesting 用于室内光采集的刚性和柔性基板上的宽禁带钙钛矿光伏

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-07-30 DOI: 10.1063/5.0284313

Ram Datt, Jinyan Guo, Renxing Lin, Ludong Li, Hairen Tan, Wing Chung Tsoi

引用次数: 0

Understanding X-ray bursts via direct measurements of (α,p) reactions 通过（α,p）反应的直接测量来理解x射线爆发

IF 2.5 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-07-30 DOI: 10.1016/j.nuclphysa.2025.123212

M.L. Avila , K. Auranen , A.D. Ayangeakaa , K. Bhatt , J. Chen , C. Fougères , C.R. Hoffman , H. Jayatissa , C.L. Jiang , B.P. Kay , E. Lopez-Saavedra , D. Neto , W.J. Ong , K.E. Rehm , D. Santiago-Gonzalez , C. Ugalde , J. Wu

引用次数: 0

Quantum Learning Theory Beyond Batch Binary Classification 超越批处理二进制分类的量子学习理论

IF 6.4 2区物理与天体物理

Quantum Pub Date : 2025-07-29 DOI: 10.22331/q-2025-07-29-1813

Preetham Mohan, Ambuj Tewari

引用次数: 0

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