Radiophysics and Quantum Electronics最新文献

Laboratory Modeling of the Atmosphere–Ocean Interaction Under a Stormwind (High-Speed Wind-Wave Channel of the Large Thermostatified Tank of the Institute of Applied Physics)

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2024-12-10 DOI: 10.1007/s11141-024-10344-5

Yu. I. Troitskaya, M. I. Vdovin, D. A. Sergeev

{"title":"Laboratory Modeling of the Atmosphere–Ocean Interaction Under a Stormwind (High-Speed Wind-Wave Channel of the Large Thermostatified Tank of the Institute of Applied Physics)","authors":"Yu. I. Troitskaya, M. I. Vdovin, D. A. Sergeev","doi":"10.1007/s11141-024-10344-5","DOIUrl":"10.1007/s11141-024-10344-5","url":null,"abstract":"We describe the results of studying the small-scale processes in the boundary layer of the atmosphere, including their contribution to the momentum exchange under the storm conditions. The main research method is laboratory modeling performed in the High-Speed Wind-Wave Channel of the Large Thermostratified Tank of the Institute of Applied Physics of the Russian Academy of Sciences (Nizhny Novgorod, Russia). A detailed description of this unique facility and the measurement methods is presented. The dependence of the aerodynamic drag coefficient on the parameters of waves and the foam coverage is studied. A theoretical model is proposed for the description of this dependence. The results of generation of the splashes, which are ripped off from breaking waves by a strong wind, are also presented. Direct-shadow visualization methods in combination with high-speed filming made it possible to classify the fragmentation mechanisms, identify the dominant one, and construct the spray generation function. The issues related to the transfer of the obtained results to the natural conditions on the basis of whitecap method are discussed in the conclusion section.","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"66 12","pages":"946 - 965"},"PeriodicalIF":0.8,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142870298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Large-Array Processing of Coherence-Degraded Signals: Analytical Study, Modeling, and Estimations of Optimization Possibilities

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2024-12-07 DOI: 10.1007/s11141-024-10346-3

A. I. Malekhanov, A. V. Smirnov

{"title":"Large-Array Processing of Coherence-Degraded Signals: Analytical Study, Modeling, and Estimations of Optimization Possibilities","authors":"A. I. Malekhanov, A. V. Smirnov","doi":"10.1007/s11141-024-10346-3","DOIUrl":"10.1007/s11141-024-10346-3","url":null,"abstract":"This paper gives a comparative analysis of various techniques of array signal processing in cases where the spatial coherence of the useful signal at the input of the receiving array is greatly weakened and the coherence length is small compared to the array size. The main focus is on realistic estimates of the practical possibilities of achieving high values of the array gain for suboptimal processing, which are close to the maximum possible values for optimal processing in such conditions. For this, a generalized parametric model of the signal coherence function is used, which permits one to analyze various reception scenarios for coherence-degraded signals and obtain key dependences characterizing output performance in terms of the array gain in a wide range of specified parameters. It is shown that the choice of the suboptimal method crucially depends on two physical parameters, namely, the relative signal coherence length (compared to the array size) and the relative level of the coherent component in the signal field (compared to its total intensity). The results are considered to be useful for various applications in long-range sonar and radar, where the coherence degradation of the signal wave fronts becomes a typical environmental effect in large array operation.","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"66 12","pages":"988 - 1011"},"PeriodicalIF":0.8,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142870293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Portevin–Le Chatelier Effect as a Nonlinear Wave Process in Deformable Alloys

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2024-12-07 DOI: 10.1007/s11141-024-10347-2

G. F. Sarafanov

{"title":"The Portevin–Le Chatelier Effect as a Nonlinear Wave Process in Deformable Alloys","authors":"G. F. Sarafanov","doi":"10.1007/s11141-024-10347-2","DOIUrl":"10.1007/s11141-024-10347-2","url":null,"abstract":"The instability mechanism of plastic deformations in crystalline alloys is studied on the basis of the autowave approach. A mathematical model is proposed for the serrated flow behavior and localization of the plastic flow in the form of deformation bands—the Portevin–Le Chatelier effect, which manifests itself in a wide range of positive Celsius temperatures. A stationary solution of the initial system of equations at a constant load is found within the framework of the proposed model; the solution is the wave front of the plastic strain rate and is interpreted as a Lüders band. The numerical analysis of the initial model shows that the irregular variations of deforming stress and the spatial wave solutions take place in the instability region determined by the N-shaped dependence of the dislocation deceleration force on the dislocation velocity. This nonlinearity of the deceleration force is due to the peculiarities of the interaction of the dislocations with impurity atoms. The critical dimensionless parameters responsible for the variety of wave solutions of the equation system are determined. For the specific values of these parameters, the irregular oscillation waveform of deforming stress is found, as well as the shape and periodicity of the bursts in plastic strain rate with the oscillation waveform and bursts being strictly correlated and forming the Portevin–Le Chatelier bands, which can be relatively uniform or randomly distributed along the length of the crystal.","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"66 12","pages":"1012 - 1022"},"PeriodicalIF":0.8,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142870295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bremsstrahlung at Low-Energy Electron–Nucleus Collisions in a Quantizing Magnetic Field. II. Close Collisions with Quasibound Motion

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2024-12-07 DOI: 10.1007/s11141-024-10343-6

S. A. Koryagin

{"title":"Bremsstrahlung at Low-Energy Electron–Nucleus Collisions in a Quantizing Magnetic Field. II. Close Collisions with Quasibound Motion","authors":"S. A. Koryagin","doi":"10.1007/s11141-024-10343-6","DOIUrl":"10.1007/s11141-024-10343-6","url":null,"abstract":"We analyze electron–nucleus collisions in a strongly magnetized ideal plasma with a low temperature at which the Coulomb interaction energy of particles at a distance of the order of the electron Larmor radius exceeds their thermal energy. In this limit, the motion of the electron in close collisions becomes quasibound. Analytical expressions for the spectral power of bremsstrahlung in the continuum at frequencies where quasibound motion makes a decisive contribution to the emission have been obtained. The proposed quantum approach is valid both in the limit of such a low energy of an electron that the latter can occupy only a fundamental Landau level before and after the collision and in the limit of classical particle motion. In the classical regime, the radiation losses approximately preserve the trajectory of the particle: the emission of a photon just changes the phase incursion of the electron wave function by the same amount within the cross section of a beam of rays approximating the state of the particle. A condition is formulated under which spontaneous emission puts the particle into a superposition of states essentially differing from the initial state by the probability for the electron to occupy different Landau levels after the collision. This emission regime takes place in the low-temperature plasma of the photosphere of a white dwarf in the infrared continuum.","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"66 12","pages":"929 - 945"},"PeriodicalIF":0.8,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142870294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Models of Propagation of Acoustic Signals and Noise in Oceanic Waveguides with Wavy Surface and the Effectiveness of Spatial Signal Processing

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2024-12-07 DOI: 10.1007/s11141-024-10345-4

M. A. Raevskii, V. G. Burdukovskaya

引用次数: 0

Scalable Quantum Processor Based on Superconducting Fluxonium Qubits 基于超导通量质子的可扩展量子处理器

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2024-10-21 DOI: 10.1007/s11141-024-10341-8

G. S. Mazhorin, A. S. Kaz’mina, T. A. Chudakova, I. A. Simakov, N. A. Maleeva, I. N. Moskalenko, V. V. Ryazanov

引用次数: 0

Waveguide Integrated Superconducting Single-Photon Detector For Photonic And Ion Quantum Processors And Neuromorphic Computing 用于光子和离子量子处理器及神经形态计算的波导集成超导单光子探测器

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2024-10-18 DOI: 10.1007/s11141-024-10340-9

V. V. Kovalyuk, I. O. Venediktov, K. O. Sedykh, S. S. Svyatodukh, S. Hydyrova, K. M. Moiseev, I. N. Florya, A. I. Prokhodtsov, V. S. Galanova, D. M. Kobtsev, A. Yu. Kuzin, A. D. Golikov, G. N. Goltsman

{"title":"Waveguide Integrated Superconducting Single-Photon Detector For Photonic And Ion Quantum Processors And Neuromorphic Computing","authors":"V. V. Kovalyuk, I. O. Venediktov, K. O. Sedykh, S. S. Svyatodukh, S. Hydyrova, K. M. Moiseev, I. N. Florya, A. I. Prokhodtsov, V. S. Galanova, D. M. Kobtsev, A. Yu. Kuzin, A. D. Golikov, G. N. Goltsman","doi":"10.1007/s11141-024-10340-9","DOIUrl":"10.1007/s11141-024-10340-9","url":null,"abstract":"We consider superconducting single-photon detectors, which are the key element of quantum optical technologies due to their unique characteristics not available in other technologies today. Since the first demonstration in Russia in 2001, such detectors have evolved significantly, and their waveguide-based versions are ready for scaling both in the fields of classical technologies (attenuated light) and of quantum optical applications (non-classical light). The paper studies the operating principle of such detectors and their main characteristics, analyzes superconducting materials and dielectric waveguide platforms, highlights the design principles, considers various levels of integration of on-chip waveguide superconductor detectors, and presents important new areas of application towards the implementation of photonic and ion quantum processors, as well as energy-efficient neuromorphic computing.","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"66 11","pages":"839 - 892"},"PeriodicalIF":0.8,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrated Circuits for Quantum Machine Learning Based on Superconducting Artificial Atoms and Methods of Their Control 基于超导人工原子的量子机器学习集成电路及其控制方法

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2024-10-18 DOI: 10.1007/s11141-024-10342-7

A. E. Tolstobrov, Sh. V. Kadyrmetov, G. P. Fedorov, S. V. Sanduleanu, V. B. Lubsanov, D. A. Kalacheva, A. N. Bolgar, A. Yu. Dmitriev, E. V. Korostylev, K. S. Tikhonov, O. V. Astafiev

{"title":"Integrated Circuits for Quantum Machine Learning Based on Superconducting Artificial Atoms and Methods of Their Control","authors":"A. E. Tolstobrov, Sh. V. Kadyrmetov, G. P. Fedorov, S. V. Sanduleanu, V. B. Lubsanov, D. A. Kalacheva, A. N. Bolgar, A. Yu. Dmitriev, E. V. Korostylev, K. S. Tikhonov, O. V. Astafiev","doi":"10.1007/s11141-024-10342-7","DOIUrl":"10.1007/s11141-024-10342-7","url":null,"abstract":"This paper is devoted to the use of quantum integrated circuits based on superconducting artificial atoms to solve quantum machine learning problems. The process of designing such chips is de- scribed in detail, including the selection of the most important geometric parameters of the device, as well as numerical calculations of electromagnetic characteristics. The process of controlling a quantum integrated circuit is described. Much attention is paid to the implementation of single- and two-qubit operations. The qubit state readout procedure is also described. A brief introduction into the field of quantum machine learning is given. An algorithm that makes it possible to solve multilabel classification problems using quantum integrated circuits is described. The selection of optimal quantum circuits for the implementation of this algorithm is made using numerical simulations. The operation of the algorithm is demonstrated by the example of standard datasets. Obtained experimental results are compared with the results of theoretical calculations.","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"66 11","pages":"907 - 928"},"PeriodicalIF":0.8,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Study of Statistical Characteristics of the High-Frequency Vibrations of a Drill-String Bottom 钻弦底高频振动统计特性的实验研究

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2024-10-01 DOI: 10.1007/s11141-024-10338-3

V. K. Bakhtin, M. S. Deryabin, D. A. Kas’yanov, S. A. Manakov, D. R. Shakurov

引用次数: 0

The Influence of Cyclic Deformation on Elastic and Acoustic Properties of Chromium-Nickel Steels 循环变形对铬镍钢弹性和声学特性的影响

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2024-10-01 DOI: 10.1007/s11141-024-10339-2

V. A. Klyushnikov, A. V. Gonchar, V. V. Mishakin, K. V. Kurashkin

引用次数: 0