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Surface Perturbation Theory in the Problem of Light Elastic Scattering on Microparticles 微粒子上光弹性散射问题的表面摄动理论
IF 0.4 4区 物理与天体物理
Moscow University Physics Bulletin Pub Date : 2025-08-06 DOI: 10.3103/S0027134925700584
A. R. Bekirov, A. F. Uspenskiy, B. S. Luk’yanchuk, A. A. Fedyanin
{"title":"Surface Perturbation Theory in the Problem of Light Elastic Scattering on Microparticles","authors":"A. R. Bekirov,&nbsp;A. F. Uspenskiy,&nbsp;B. S. Luk’yanchuk,&nbsp;A. A. Fedyanin","doi":"10.3103/S0027134925700584","DOIUrl":"10.3103/S0027134925700584","url":null,"abstract":"<p>Using the method of perturbation theory, the problem of light scattering by particles of arbitrary axisymmetric shape has been solved. The proposed approach makes it possible to consider substantial deformations by decomposing the total deformation into smaller ones. The issues of convergence, applicability limits and conditions are discussed; a comparison with an alternative computational method is presented.</p>","PeriodicalId":711,"journal":{"name":"Moscow University Physics Bulletin","volume":"80 3","pages":"537 - 544"},"PeriodicalIF":0.4,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161990","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
Dynamics of Paramagnetic Centers in Hafnium Oxide during Electron-Beam Deposition 电子束沉积过程中氧化铪顺磁中心的动力学
IF 0.4 4区 物理与天体物理
Moscow University Physics Bulletin Pub Date : 2025-08-06 DOI: 10.3103/S0027134925700614
E. A. Konstantinova, A. V. Koroleva, A. V. Pavlikov, E. V. Kytina, A. S. Ilin, M. N. Martyshov
{"title":"Dynamics of Paramagnetic Centers in Hafnium Oxide during Electron-Beam Deposition","authors":"E. A. Konstantinova,&nbsp;A. V. Koroleva,&nbsp;A. V. Pavlikov,&nbsp;E. V. Kytina,&nbsp;A. S. Ilin,&nbsp;M. N. Martyshov","doi":"10.3103/S0027134925700614","DOIUrl":"10.3103/S0027134925700614","url":null,"abstract":"<p>Hafnium oxide, possessing a high permittivity, is of interest for use as memristors in electronics. In this paper, a comparative analysis of the type and main characteristics of paramagnetic centers has, for the first time, been performed on a series of samples that underwent successive synthesis stages: from the initial target sample to the film on a substrate It has been established that the primary type of defects in the studied materials are oxygen vacancies with an unpaired electron (F<span>({}^{+})</span> centers). It has been found that during the deposition of the target (crystalline hafnium oxide), the concentration of F<span>({}^{+})</span> centers decreases, probably as a result of recharging. It has been established that in the deposited hafnium oxide film, the concentration of F<span>({}^{+})</span> defects increases by an order of magnitude. The observed experimental fact is explained by the disordered (amorphous) structure of the film.</p>","PeriodicalId":711,"journal":{"name":"Moscow University Physics Bulletin","volume":"80 3","pages":"585 - 588"},"PeriodicalIF":0.4,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162134","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
Analytical Method for Estimating the Effect of Small Losses in the Layers of Periodic Two-Component Antireflection Structures with Wave-Coupled Layer Thicknesses in the Period on Their Optical Characteristics 具有周期波耦合层厚的周期性双分量增透结构层中小损耗对其光学特性影响的分析方法
IF 0.4 4区 物理与天体物理
Moscow University Physics Bulletin Pub Date : 2025-08-06 DOI: 10.3103/S0027134925700651
A. E. Zhitelev, A. V. Kozar
{"title":"Analytical Method for Estimating the Effect of Small Losses in the Layers of Periodic Two-Component Antireflection Structures with Wave-Coupled Layer Thicknesses in the Period on Their Optical Characteristics","authors":"A. E. Zhitelev,&nbsp;A. V. Kozar","doi":"10.3103/S0027134925700651","DOIUrl":"10.3103/S0027134925700651","url":null,"abstract":"<p>A method is proposed for estimating the effect of small losses in the layers of periodic two-component antireflection structures with wave-coupled thicknesses in the period (<span>(pi)</span>-structures) on their optical characteristics using simple analytical ratios. The applicability of the proposed method is demonstrated for various refractive indices of the antireflected media, absorption coefficients of the layer materials, and numbers of layers. The correctness of the obtained results is confirmed by numerical experiment.</p>","PeriodicalId":711,"journal":{"name":"Moscow University Physics Bulletin","volume":"80 3","pages":"545 - 550"},"PeriodicalIF":0.4,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162145","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
Light Coupling Devices for Subwavelength Waveguides Based on Second-Order Surfaces, Fabricated by Two-Photon Laser Lithography 基于二阶表面的亚波长波导光耦合器件的双光子激光光刻制备
IF 0.4 4区 物理与天体物理
Moscow University Physics Bulletin Pub Date : 2025-08-06 DOI: 10.3103/S002713492570064X
I. O. Batuev, K. A. Smirnov, I. I. Tsiniaikin, T. V. Murzina, A. I. Maydykovskiy
{"title":"Light Coupling Devices for Subwavelength Waveguides Based on Second-Order Surfaces, Fabricated by Two-Photon Laser Lithography","authors":"I. O. Batuev,&nbsp;K. A. Smirnov,&nbsp;I. I. Tsiniaikin,&nbsp;T. V. Murzina,&nbsp;A. I. Maydykovskiy","doi":"10.3103/S002713492570064X","DOIUrl":"10.3103/S002713492570064X","url":null,"abstract":"<p>Light input/output devices are essential for coupling between bulk and fiber optics devices and photonic integrated circuits (PICs). In this work, broadband couplers for optical waveguides lifted from the surface were fabricated using two-photon laser lithography, and comparison with numerical modelling was carried out. It was demonstrated experimentally that the ellipsoid-based coupler is optimal for coupling light into the waveguide. The average transmittance of a system comprising two adapters in the spectral range 700–1000 nm for <span>(s)</span>-polarized radiation amounted to at least 27<span>(%)</span>.</p>","PeriodicalId":711,"journal":{"name":"Moscow University Physics Bulletin","volume":"80 3","pages":"529 - 536"},"PeriodicalIF":0.4,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161984","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
Radiation Technologies for the Treatment of Biological Objects 生物物体处理的辐射技术
IF 0.4 4区 物理与天体物理
Moscow University Physics Bulletin Pub Date : 2025-08-06 DOI: 10.3103/S0027134925700572
A. P. Chernyaev, V. V. Rozanov, E. K. Kozlova, I. V. Matveychuk, U. A. Bliznyuk, V. S. Ipatova
{"title":"Radiation Technologies for the Treatment of Biological Objects","authors":"A. P. Chernyaev,&nbsp;V. V. Rozanov,&nbsp;E. K. Kozlova,&nbsp;I. V. Matveychuk,&nbsp;U. A. Bliznyuk,&nbsp;V. S. Ipatova","doi":"10.3103/S0027134925700572","DOIUrl":"10.3103/S0027134925700572","url":null,"abstract":"<p>The article provides an overview of the current state of the application of radiation technologies for the treatment of food and biomedical objects both worldwide and in Russia. The history of the development of radiation technologies and their connection with the evolution of radiation-technical facilities used for the treatment of biological objects and materials is described. Characteristics of radiation sources and irradiation doses applied to food and biomedical objects are presented. The main international and domestic standards regulating the radiation treatment of food products and medical items, dosimetric control, and methods for identifying irradiated food are given. The article discusses the physical mechanisms of radiation effects on target microorganisms and surrounding biomacromolecules in irradiated biological objects. The main Russian research centers conducting studies in the field of radiation treatment of biological objects and materials are listed, as well as industrial centers providing radiation treatment services within the Russian Federation. The article also reviews the main directions and research results on optimizing radiation treatment of biological objects and materials conducted at the Department of Accelerator Physics and Radiation Medicine of the Faculty of Physics, Lomonosov Moscow State University, over the past 15–20 years.</p>","PeriodicalId":711,"journal":{"name":"Moscow University Physics Bulletin","volume":"80 3","pages":"389 - 415"},"PeriodicalIF":0.4,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162429","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
Human Internal Radiation Doses from Radon during Heating of Dwelling Houses with Natural Gas in Northern Conditions 北方地区天然气供暖过程中氡对人体内部辐射的影响
IF 0.4 4区 物理与天体物理
Moscow University Physics Bulletin Pub Date : 2025-08-06 DOI: 10.3103/S0027134925700699
V. N. Kononov, A. V. Panina, K. A. Petrova  (, ), S. N. Mamaeva
{"title":"Human Internal Radiation Doses from Radon during Heating of Dwelling Houses with Natural Gas in Northern Conditions","authors":"V. N. Kononov,&nbsp;A. V. Panina,&nbsp;K. A. Petrova \u0000 (,&nbsp;),&nbsp;S. N. Mamaeva","doi":"10.3103/S0027134925700699","DOIUrl":"10.3103/S0027134925700699","url":null,"abstract":"<p>In some sources, there is information [1, 2, 11, 12] that natural gas may contain radon, but there are no detailed studies of radon emanation from network natural gas, and also this problem of radon emanation from natural gas has an important practical significance in connection with the implementation of the program of gasification of settlements in Yakutia [3]. It is known that radon is one of the main causes of cancer development, including more often lung cancer. Studies conducted in different countries have shown that even low concentrations of radon registered in residential premises create health risks and contribute to the development of lung cancer. It is known that prolonged exposure to radon with an average concentration increased by 100 Bq/m<span>({}^{3})</span> increases the probability of developing lung cancer by 16<span>(%)</span> [4]. On this basis, the study of radon safety in permafrost conditions is an urgent problem.</p>","PeriodicalId":711,"journal":{"name":"Moscow University Physics Bulletin","volume":"80 3","pages":"520 - 528"},"PeriodicalIF":0.4,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161980","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
Quantum Communication Scheme Described by a Regular Four-Dimensional Complex Polytope 正则四维复多面体描述的量子通信方案
IF 0.4 4区 物理与天体物理
Moscow University Physics Bulletin Pub Date : 2025-08-06 DOI: 10.3103/S0027134925700535
A. Yu. Vlasov
{"title":"Quantum Communication Scheme Described by a Regular Four-Dimensional Complex Polytope","authors":"A. Yu. Vlasov","doi":"10.3103/S0027134925700535","DOIUrl":"10.3103/S0027134925700535","url":null,"abstract":"<p>At present, generalizations of quantum communication protocols from qubits to systems with higher-dimensional state spaces (qudits) commonly employ mutually unbiased bases (MUB), the construction of which is known for any dimension equal to a prime power. However, in low dimensions, there also exist formally more symmetric state systems described by regular complex polytopes, which are a generalization of the concept of regular polytopes to complex spaces. This work considers the application of a model originally proposed by R. Penrose and based on the geometry of the dodecahedron and two entangled particles with spin 3/2. In a more general case, two arbitrary quantum systems with four basis states (ququarts) can be used instead. It was subsequently shown that this system of 40 states is equivalent to the Witting configuration and is related to the four-dimensional complex polytope described by Coxeter. The paper proposes a quantum key distribution protocol based on contextuality, utilizing this configuration.</p>","PeriodicalId":711,"journal":{"name":"Moscow University Physics Bulletin","volume":"80 3","pages":"560 - 566"},"PeriodicalIF":0.4,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161981","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
Investigation of the Topography and Mechanical Properties of the System Living Cell–Hydrogel Using Scanning Ion-Conductance Microscopy 用扫描离子电导显微镜研究系统活细胞-水凝胶的形貌和力学性能
IF 0.4 4区 物理与天体物理
Moscow University Physics Bulletin Pub Date : 2025-08-06 DOI: 10.3103/S0027134925700560
T. N. Tikhonova, A. V. Barkovaya, V. V. Mamed-Nabizade, S. T. Matskeplishvili, N. N. Sysoev, A. S. Erofeev, E. A. Fadeev
{"title":"Investigation of the Topography and Mechanical Properties of the System Living Cell–Hydrogel Using Scanning Ion-Conductance Microscopy","authors":"T. N. Tikhonova,&nbsp;A. V. Barkovaya,&nbsp;V. V. Mamed-Nabizade,&nbsp;S. T. Matskeplishvili,&nbsp;N. N. Sysoev,&nbsp;A. S. Erofeev,&nbsp;E. A. Fadeev","doi":"10.3103/S0027134925700560","DOIUrl":"10.3103/S0027134925700560","url":null,"abstract":"<p>At present, hydrogels are attracting increasing interest due to their unique characteristics for use in various fields, such as regenerative medicine, 3D cell culturing, and drug delivery. The main challenge in applying hydrogels in tissue engineering is the accurate assessment of their mechanical characteristics. In this work, a non-invasive method of scanning ion-conductance microscopy (SICM) is used to determine the stiffness of living human neuroblastoma SH-SY5Y cells cultured on a soft, self-assembling hydrogel composed of the Fmoc-FF peptide. The Young’s modulus for SH-SY5Y cells decreases with increasing substrate stiffness, with values of 1015 and 750 Pa on a Petri dish and Fmoc-FF hydrogel, respectively. This method enables simultaneous investigation of the stiffness of living cells and soft hydrogels, which is promising in the field of regenerative medicine.</p>","PeriodicalId":711,"journal":{"name":"Moscow University Physics Bulletin","volume":"80 3","pages":"606 - 612"},"PeriodicalIF":0.4,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161987","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
Analytical Models of Nonstationary Physical Fields of Planets in the Local Version 行星非定常物理场的局部解析模型
IF 0.4 4区 物理与天体物理
Moscow University Physics Bulletin Pub Date : 2025-08-06 DOI: 10.3103/S0027134925700687
A. G. Yagola, I. E. Stepanova, A. N. Levashov, I. I. Kolotov, A. V. Gorbachev
{"title":"Analytical Models of Nonstationary Physical Fields of Planets in the Local Version","authors":"A. G. Yagola,&nbsp;I. E. Stepanova,&nbsp;A. N. Levashov,&nbsp;I. I. Kolotov,&nbsp;A. V. Gorbachev","doi":"10.3103/S0027134925700687","DOIUrl":"10.3103/S0027134925700687","url":null,"abstract":"<p>A new method is proposed for constructing analytical models of nonstationary vector fields based on the local version of the linear integral representation method. Variational formulations of inverse coefficient problems are presented for a system of two nonlinear differential equations describing the motion of a charged magnetic fluid. A uniqueness theorem for the solution of the inverse coefficient problem for the equations of magnetohydrodynamics is formulated.</p>","PeriodicalId":711,"journal":{"name":"Moscow University Physics Bulletin","volume":"80 3","pages":"458 - 466"},"PeriodicalIF":0.4,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162435","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
Parallelization of Quantum Algorithms Using Quantum Teleportation 利用量子隐形传态实现量子算法的并行化
IF 0.4 4区 物理与天体物理
Moscow University Physics Bulletin Pub Date : 2025-08-06 DOI: 10.3103/S002713492570050X
S. S. Sysoev
{"title":"Parallelization of Quantum Algorithms Using Quantum Teleportation","authors":"S. S. Sysoev","doi":"10.3103/S002713492570050X","DOIUrl":"10.3103/S002713492570050X","url":null,"abstract":"<p>This study proposes a method for parallelizing quantum algorithms in the circuit model based on the technique of quantum gate teleportation. The resulting parallel representation of the algorithm has reduced circuit depth and, consequently, a higher probability of correct execution under conditions of increasing quantum state decoherence over time. The reduction in circuit depth is achieved by increasing circuit width, i.e., the number of qubits simultaneously used in the computation.</p>","PeriodicalId":711,"journal":{"name":"Moscow University Physics Bulletin","volume":"80 3","pages":"567 - 572"},"PeriodicalIF":0.4,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161982","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
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