Annalen der Physik最新文献_第9页

Design of a 10.8 to 34.6 GHz Ultra-Wideband Transparent Metamaterial Absorber Using an Equivalent Circuit Model 利用等效电路模型设计 10.8 至 34.6 GHz 超宽带透明超材料吸收器

IF 2.2 4区物理与天体物理

Annalen der Physik Pub Date : 2024-09-08 DOI: 10.1002/andp.202400107

Yongxi Cai, Jiaqing Liu, Jizhe Zhang, Xiao Li, Daxing Dong, Xiaogang Yin, Yangyang Fu, Youwen Liu

{"title":"Design of a 10.8 to 34.6 GHz Ultra-Wideband Transparent Metamaterial Absorber Using an Equivalent Circuit Model","authors":"Yongxi Cai, Jiaqing Liu, Jizhe Zhang, Xiao Li, Daxing Dong, Xiaogang Yin, Yangyang Fu, Youwen Liu","doi":"10.1002/andp.202400107","DOIUrl":"10.1002/andp.202400107","url":null,"abstract":"In this paper, an ultra-wideband metamaterial absorber (UWMA) is proposed and demonstrated by using a transparent and flexible sandwich structure, which consists of a top patterned double-square loop (DSL) of conductive film, the polymer interlayer, the bottom conductive film. The work presents the UWMA's equivalent circuit model for a macroscopic analysis of its physical mechanism. Further, optimizing UWMA's structural parameters using this equivalent circuit model can greatly enhance its efficiency. The absorption coefficient of the designed structure achieves over 90% within the wide frequency range from 10.82 to 34.59 GHz due to the overlapping of three absorption bands. The experimental results indicate that the absorption coefficient of the fabricated structure exceeds 60% in the frequency range of 10.45–35.28 GHz, and reaches 90% in the majority of frequency range of 10.71–28.51 GHz, while its averaged optical transparency in the visible spectrum exceeds 75%. The UWMA achieves high transparency due to a small ratio of the surface area occupied by the ITO pattern to the total area and realizes multiple-resonance ultra-wideband absorption with conformality while maintaining a thickness of only 2.2 mm, which has diverse applications in the field of electromagnetics, including aircraft stealth, transparent chambers, and flexible electronic screens.","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"536 12","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142182163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

On Regular Negative Mass Black Holes Under Unitary Time and Proper Antichronous Transformations 论单位时间和适当反时空变换下的常规负质量黑洞

IF 2.2 4区物理与天体物理

Annalen der Physik Pub Date : 2024-09-04 DOI: 10.1002/andp.202400139

Manuel Uruena Palomo

{"title":"On Regular Negative Mass Black Holes Under Unitary Time and Proper Antichronous Transformations","authors":"Manuel Uruena Palomo","doi":"10.1002/andp.202400139","DOIUrl":"10.1002/andp.202400139","url":null,"abstract":"A non-singular black hole solution is briefly presented which violates energy conditions only at its interior by postulating a consistent shift to negative energies and gravitationally repulsive negative masses at the event horizon. This shift is the unitary parity-time <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>P</mi>\u0000 <mi>T</mi>\u0000 </mrow>\u0000 <annotation>$PT$</annotation>\u0000 </semantics></math> transformation of relativistic quantum mechanics and the proper antichronous transformation of the full Lorentz group. The transformation at the event horizon respects Einstein's equivalence principle, and the considered negative mass interaction does not result in the runaway motion paradox or vacuum instability. The correspondence of these regular black holes with observed ones is studied by proposing another mechanism of black hole growth independent of accretion and merging due to interior increasing entropy, which attempts to solve the unexplained size and formation of high-redshift supermassive black holes, the intermediate mass gap, and the information paradox.","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"536 11","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142182206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Low-Energy Spin Manipulation Using Ferromagnetism 利用铁磁性进行低能自旋操纵

IF 2.2 4区物理与天体物理

Annalen der Physik Pub Date : 2024-09-04 DOI: 10.1002/andp.202400226

Valentin Desbuis, Daniel Lacour, Coriolan Tiusan, Wolfgang Weber, Michel Hehn

引用次数: 0

Energy Localization and Topological Defect in Spherical Non-Hermitian Topolectrical Circuits 球面非赫米提拓扑电路中的能量定位和拓扑缺陷

IF 2.2 4区物理与天体物理

Annalen der Physik Pub Date : 2024-08-31 DOI: 10.1002/andp.202400026

Xizhou Shen, Xiumei Wang, Haotian Guo, Xingping Zhou

引用次数: 0

Quantum Correlation Enhanced with Quantum Coherent Feedback Control in a Cavity-magnon Hybrid System 利用腔磁混合系统中的量子相干反馈控制增强量子相关性

IF 2.2 4区物理与天体物理

Annalen der Physik Pub Date : 2024-08-30 DOI: 10.1002/andp.202400221

Yue-Han Lin, Ya-Qin Lin, Zhi-Ying Lin, Rong-Can Yang, Hong-Yu Liu

{"title":"Quantum Correlation Enhanced with Quantum Coherent Feedback Control in a Cavity-magnon Hybrid System","authors":"Yue-Han Lin, Ya-Qin Lin, Zhi-Ying Lin, Rong-Can Yang, Hong-Yu Liu","doi":"10.1002/andp.202400221","DOIUrl":"10.1002/andp.202400221","url":null,"abstract":"A scheme is proposed to enhance quantum correlation, including entanglement and steering, for two magnon modes in a cavity-magnon hybrid system through coherent quantum feedback. The hybrid system consists of a microwave cavity and two YIG spheres, which incorporates a nonlinear flux-driven Josephson parametric amplifier in order for the generation of two photons within the cavity simultaneously. A quantum coherent feedback loop is used for the reduction of effective dissipation. By modulating feedback parameters, optimal bipartite and tripartite entanglement, as well as quantum steering are derived. Importantly, compared with the same setup without coherent feedback, the proposed scheme significantly improves quantum correlation. Furthermore, by optimizing the feedback reflectivity and the ratio of cavity-magnon coupling strength, the enhancement of asymmetric steering can be controlled. Notably, incorporating the feedback loop effectively increase its robustness against thermal noise, thus the scheme offer better prospect for experimental development. This study paves the way for advancements in quantum information processing and quantum entanglement within cavity-magnonics.","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"536 11","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142182166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Research Progress of Femtosecond Laser-Printed Perovskite Quantum Dots in Amorphous Glass 非晶玻璃中飞秒激光打印 Perovskite 量子点的研究进展

IF 2.2 4区物理与天体物理

Annalen der Physik Pub Date : 2024-08-30 DOI: 10.1002/andp.202400152

Han Xiao, Lingwei Zeng, Lei Lei, Daqin Chen

引用次数: 0

Topological Optical Waveguiding of Exciton-Polariton Condensates 激子-极化子凝聚态的拓扑光波导

IF 2.2 4区物理与天体物理

Annalen der Physik Pub Date : 2024-08-27 DOI: 10.1002/andp.202400229

J. Beierlein, O. A. Egorov, P. Gagel, T. H. Harder, A. Wolf, M. Emmerling, S. Betzold, F. Jabeen, L. Ma, S. Höfling, U. Peschel, S. Klembt

引用次数: 0

The Conformal Image of the Electron 电子的共形图像

IF 2.2 4区物理与天体物理

Annalen der Physik Pub Date : 2024-08-23 DOI: 10.1002/andp.202400101

De-Hone Lin

{"title":"The Conformal Image of the Electron","authors":"De-Hone Lin","doi":"10.1002/andp.202400101","DOIUrl":"10.1002/andp.202400101","url":null,"abstract":"The construction of a transformation image is pivotal to the transformation design method for steering waves around an object. Constructing the conformal images of an electron, however, remains a challenge, primarily due to the complexities involved in realizing the spin structure within the image space. This study proposes a novel solution in this regard of the electron's spin structure on a <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mn>2</mn>\u0000 <mi>d</mi>\u0000 </mrow>\u0000 <annotation>$2d$</annotation>\u0000 </semantics></math> surface, leveraging on the interactions between the electron and a vector potential. By introducing a scalar potential to facilitate the generation of a conformal metric structure and differential operator in the Dirac equation, it is demonstrated that the conformal image of the electron can indeed be constructed within an appropriate electromagnetic field. Furthermore, an equivalence between the geometric effect of a conformal deformation on the electron and the action of an electromagnetic force is established. Electromagnetic fields are used to generate form-invariant conformal images of the electron within a plane and on a sphere. These examples help showcase the effectiveness of the currently presented method in realizing the conformal images of the electron in various settings.","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"536 12","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142182168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Revisiting Relativistic Electrically Charged Polytropic Spheres 重温相对论带电多向球体

IF 2.2 4区物理与天体物理

Annalen der Physik Pub Date : 2024-08-20 DOI: 10.1002/andp.202400145

Andrés Aceña, Bruno Cardin Guntsche, Iván Gentile de Austria

{"title":"Revisiting Relativistic Electrically Charged Polytropic Spheres","authors":"Andrés Aceña, Bruno Cardin Guntsche, Iván Gentile de Austria","doi":"10.1002/andp.202400145","DOIUrl":"10.1002/andp.202400145","url":null,"abstract":"The problem of the structure and physical properties of electrically charged static spherically symmetric solutions of the Einstein-Maxwell system of equations is revisited, where the matter model is a polytropic gas. A relativistic polytrope equation of state (EOS) is considered and the electric charge density is assumed to be proportional to the rest mass density. Families of solutions corresponding to various sets of parameters are constructed and analyzed their stability and compliance with the causality requirement, emphasizing the possibility of obtaining black hole mimickers. Concretely, this study wants to test how much electric charge a given object can hold and how compact it can be. It is concluded that there is a microscopic bound on the charge density to rest mass density ratio coincident with the macroscopic bound regarding the extremal Reissner-Nordström (ERN) black hole. The macroscopic charge to mass ratio for the object can exceed the corresponding microscopic ratio if the object is non-extremal. Crucially, the only way to construct a black hole mimicker is by taking a subtle limit in which an electrically counterpoised dust (ECD) solution is attained.","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"536 12","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142182170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Heralded and Complete Interconversion Between W State and Knill–Laflamme–Milburn State via State-Selective Reflection with Robust Fidelity 通过稳健保真的状态选择性反射实现 W 状态与克尼尔-拉弗兰梅-米尔本状态之间的预示性完全相互转换

IF 2.2 4区物理与天体物理

Annalen der Physik Pub Date : 2024-08-17 DOI: 10.1002/andp.202400215

Xue-Mei Ren, Jing Guo, Fang-Fang Du

引用次数: 0