Journal of Experimental and Theoretical Physics最新文献_第10页

Analysis of the Result of the Neutrino-4 Experiment Together with Other Experiments on the Search for Sterile Neutrinos within the 3 + 1 Neutrino Model 中微子-4实验与其它在3+1中微子模型中寻找无菌中微子实验结果的分析

IF 1.1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2023-08-22 DOI: 10.1134/S1063776123070130

A. P. Serebrov, R. M. Samoilov, M. E. Chaikovskii

{"title":"Analysis of the Result of the Neutrino-4 Experiment Together with Other Experiments on the Search for Sterile Neutrinos within the 3 + 1 Neutrino Model","authors":"A. P. Serebrov, R. M. Samoilov, M. E. Chaikovskii","doi":"10.1134/S1063776123070130","DOIUrl":"10.1134/S1063776123070130","url":null,"abstract":"The correspondence of the results obtained in the Neutrino-4 experiment with the results of the NEOS, DANSS, STEREO, and PROSPECT experiments at reactors, the MiniBooNE, LSND, and MicroBoone experiments at accelerators, and the IceCube and BEST experiments with a 51Cr neutrino source is analyzed. The agreement between the results of the Neutrino-4 experiment, the BEST experiment, and the gallium anomaly on the mixing angle is discussed. The discrepancy between the results of the listed direct experiments with the results of the reactor anomaly, as well as with constraints from solar and cosmological data, is discussed. It is shown that the results of these direct experiments on the search for sterile neutrinos and the IceCube experiment do not contradict the Neutrino-4 experiment within the 3 + 1 neutrino model within 3σ contours of experimental errors. The sterile neutrino parameters from the Neutrino-4 and BEST experiments make it possible to estimate the sterile neutrino mass as m4 = (2.70 ± 0.22) eV and the effective mass of the electron neutrino as ({{m}_{{4{{nu }_{e}}}}}) = (0.86 ± 0.21) eV. The matrix of the absolute values of the 3 + 1 neutrino model mixing parameters and the mixing scheme are presented.","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4847551","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

Melting Scenarios of Two-Dimensional Systems: Possibilities of Computer Simulation 二维系统的熔化情景:计算机模拟的可能性

IF 1.1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2023-08-22 DOI: 10.1134/S1063776123070129

V. N. Ryzhov, E. A. Gaiduk, E. E. Tareeva, Yu. D. Fomin, E. N. Tsiok

引用次数: 0

Classification and Dynamics of Ultralean Hydrogen–Air Flames in Horizontal Cylindrical Hele–Shaw Cells 水平圆柱形Hele-Shaw电池中超稀薄氢-空气火焰的分类和动力学

IF 1.1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2023-08-22 DOI: 10.1134/S106377612307004X

P. V. Moskalev, V. P. Denisenko, I. A. Kirillov

{"title":"Classification and Dynamics of Ultralean Hydrogen–Air Flames in Horizontal Cylindrical Hele–Shaw Cells","authors":"P. V. Moskalev, V. P. Denisenko, I. A. Kirillov","doi":"10.1134/S106377612307004X","DOIUrl":"10.1134/S106377612307004X","url":null,"abstract":"Using the successively inverted projection method, we studied the dynamics of ultralean hydrogen–air flames propagating freely in a horizontal cylindrical Hele–Shaw cell. To quantify the two revealed characteristics of the flame dynamics—the dependence of the average flame velocities on time and the dependence of the initial flame velocity on the stoichiometry of the initial hydrogen–air mixture—we proposed time and stoichiometric scaling relations. The first relation approximates the dependence of the path of the flame front in hydrogen–air mixtures with an initial hydrogen concentration exceeding a certain critical value. The second relation approximates the dependencies of the initial flame front velocities on the hydrogen concentration. The general relationships for topologically different types of ultralean hydrogen–air flames can be interpreted as additional evidence of the presence of a general mechanism for the transition from discrete fronts of isolated drifting ball flames to a quasi-continuous deflagration flame front through a cascade of bifurcations.","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4851019","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

High Harmonic Generation with Many-Particle Coulomb Interaction in Graphene Quantum Dot 石墨烯量子点中多粒子库仑相互作用的高谐波产生

IF 1.1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2023-08-22 DOI: 10.1134/S1063776123070026

Kh. V. Sedrakian, A. G. Ghazaryan, B. R. Avchyan, G. A. Musayelyan, T. M. Markosyan

引用次数: 0

YBaCo4O7 + x (x = 0, 0.1) System: From Antiferromagnetism to Ferromagnetism YBaCo4O7 + x (x = 0,0.1)体系:从反铁磁性到铁磁性

IF 1.1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2023-08-22 DOI: 10.1134/S1063776123070038

Z. A. Kazei, M. M. Markina, V. V. Snegirev, M. S. Stolyarenko

{"title":"YBaCo4O7 + x (x = 0, 0.1) System: From Antiferromagnetism to Ferromagnetism","authors":"Z. A. Kazei, M. M. Markina, V. V. Snegirev, M. S. Stolyarenko","doi":"10.1134/S1063776123070038","DOIUrl":"10.1134/S1063776123070038","url":null,"abstract":"The modification of magnetic and elastic properties of YBaCo4O7 + x (x = 0, 0.1) cobaltites at a slight controlled deviation from stoichiometry (x) has been investigated. The magnetic properties of stoichiometric YBaCo4O7 demonstrate nontrivial behavior, which is inconsistent with the generally accepted notion of phase transitions with long-range magnetic order. Only magnetic moment ΔM = MFC – MZFC induced by an external magnetic field (an analog of thermoremanent magnetization) exhibits anomalies at magnetic phase transition temperatures TN1 and TN2 that coincide with those of Young’s modulus anomalies, whereas in the magnetic susceptibility curves taken in the FC and ZFC modes, phase transitions are not discerned. At a small off-stoichiometry (x = 0.1), induced moment ΔM rises by an order of magnitude and a residual ferromagnetic moment of about 10–3 μB arises in the magnetization curves. Two scenarios of the cobalt subsystem magnetic behavior with increasing part of cobalt ions Co3+ have been discussed. It has been found that when YBaCo4O7 + x cobaltites deviate from stoichiometry, the evolution of their magnetic properties is similar to that observed at the transition from Y-based to Ca-based cobaltite.","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4853853","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

Nonlinear Electro-Hydrodynamics of Liquid Crystals 液晶的非线性电流体力学

IF 1.1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2023-08-22 DOI: 10.1134/S1063776123070075

E. S. Pikina, A. R. Muratov, E. I. Kats, V. V. Lebedev

{"title":"Nonlinear Electro-Hydrodynamics of Liquid Crystals","authors":"E. S. Pikina, A. R. Muratov, E. I. Kats, V. V. Lebedev","doi":"10.1134/S1063776123070075","DOIUrl":"10.1134/S1063776123070075","url":null,"abstract":"We present nonlinear dynamic equations for nematic and smectic A liquid crystals in the presence of an alternating electric field and explain their derivation in detail. The local electric field acting in any liquid-crystalline system is expressed as a sum of external electric field, the fields originating from feedback of liquid crystal order parameter, and a field, created by charged impurities. The system tends to decrease the total electric field, because it lowers the energy density. This basically nonlinear problem is not a pure academic interest. In the realm of liquid crystals and their applications, utilized nowadays modern experimental techniques have progressed to the point where even small deviations from the linear behavior can be observed and measured with a high accuracy. We follow hydrodynamic approach which is the macroscopic description of condensed matter systems in the low frequency and long wavelength limit. Nonlinear hydrodynamic equations are well established to describe simple fluids. Similar approaches (with degrees of freedom related to the broken orientational or translational symmetry included) have been used also for liquid crystals. However to study behavior of strongly perturbed (well above the thresholds of various electro-hydrodynamic instabilities) liquid crystals, the nonlinear equations should include soft electromagnetic degrees of freedom as well. There are many examples of such instabilities, e.g., classical Carr-Helfrich instability triggered by the competitive electric and viscous torques, flexoelectric instability, and so one. Therefore the self-consistent derivation of the complete set of the nonlinear electro-hydrodynamic equations for liquid crystals became an actual task. The aim of our work is to present these equations, which is a mandatory step to handle any nonlinear phenomenon in liquid crystals.","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4848923","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

Structure of Ion–Molecular H+(H2O)n (n = 2–6) Complexes and the Thermodynamic Characteristics of Proton Hydration in Gas Atmosphere 离子-分子H+(H2O)n (n = 2-6)配合物的结构及气体气氛中质子水化的热力学特性

IF 1.1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2023-08-22 DOI: 10.1134/S1063776123070117

V. V. Reshetnyak, O. B. Reshetnyak, A. V. Filippov

{"title":"Structure of Ion–Molecular H+(H2O)n (n = 2–6) Complexes and the Thermodynamic Characteristics of Proton Hydration in Gas Atmosphere","authors":"V. V. Reshetnyak, O. B. Reshetnyak, A. V. Filippov","doi":"10.1134/S1063776123070117","DOIUrl":"10.1134/S1063776123070117","url":null,"abstract":"The isomers of ion–molecular H+(H2O)n complexes including up to six water molecules have been studied using quantum chemistry methods. The atomic positions in the isomers corresponding to the global and deepest local minima of potential energy are calculated using the basin-hopping algorithm. The activation energies of some configuration transformations are estimated. The thermodynamic characteristics of the clustering and decomposition of complexes are determined in a harmonic approximation, and they are in good agreement with experimental data. The possibility of simplifying the theoretical investigation of reactions by averaging the thermodynamic characteristics over various channels for energetically close isomers is shown. A weak dependence of the entropy of a reaction on the complex size has been found. A simplified model is proposed to explain the calculation results, and its use for estimating the entropies of complex clustering and decomposition reactions gives good agreement with the experimental results.","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4845942","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

Easy-Plane Antiferromagnet in Tilted Field: Gap in Magnon Spectrum and Susceptibility 倾斜场中的易平面反铁磁体:磁振子谱和磁化率的间隙

IF 1.1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2023-08-22 DOI: 10.1134/S1063776123070087

A. S. Shcherbakov, O. I. Utesov

引用次数: 0

Analysis of the Process e+e– → H0A0 in IHDM in the Presence of a Linearly Polarized Laser Field 线偏振激光场存在下IHDM中e+e -→H0A0过程的分析

IF 1.1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2023-08-22 DOI: 10.1134/S1063776123070063

M. Ouhammou, M. Ouali, S. Taj, R. Benbrik, B. Manaut

引用次数: 0

Electrostatic Interaction of Bilayer Macroparticles 双层宏观粒子的静电相互作用

IF 1.1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2023-08-22 DOI: 10.1134/S1063776123070105

A. V. Filippov

引用次数: 0