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Limiting Velocity and Dispersion Law of Domain Walls in Ferrimagnets Close to the Spin Compensation Point
JETP Letters. 2019. Vol. 110. No. 7. P. 481-486.
The motion of domain walls in GdFeCo-type ferrimagnets near the point of compensation of sublattice spins s1 and s2, when the effects of the exchange increase in the limiting wall velocity take place, is theoretically studied. The energy E and momentum P of the wall are determined and the dispersion relation E = E(P) is derived. It is found that some walls become unstable at a sufficiently small decompensation value s1 - s2 < νc(s1 + s2), νc ≪ 1, and the dispersion relation E(P) has an end point at some finite momentum. At s1 - s2 > νc(s1 + s2), this dispersion relation, as well as that for ferromagnets, is periodic.
Blyakhman L. G., Morozov V. P., Tyutin V. V., Труды НГТУ им. Р.Е. Алексеева 2016 № 3 (114) С. 9-15
Цель работы: Исследована динамика двухкомпонентных (векторных) солитонов Давыдова-Скотта(ДС) при пространственно-скоростном рассогласовании высокочастотных (ВЧ) и низкочастотных (НЧ) компонент. Рассмотрение проведено в рамках Захаровского типа системы двух связанных уравнений для ВЧ и НЧ поля. В этой системе ВЧ поле описывается линейным уравнением Шредингера с переменным во времени и пространстве потенциалом, вызванным НЧ компонентой. НЧ компонента в этой ...
Added: October 5, 2016
Blyakhman L. G., Gromov E., Malomed B. A. et al., Chaos, Solitons and Fractals 2018 No. 117 P. 264-268
The dynamics of two-component solitons with a small spatial displacement of the high-frequency (HF) component relative to the low-frequency (LF) one is investigated in the framework of the Zakharov-type system. In this system, the evolution of the HF field is governed by a linear Schrödinger equation with the potential generated by the LF field, while ...
Added: November 12, 2018
Blyakhman L. G., Gromov E., Onosova I. V. et al., Physics Letters A 2017 Vol. 381 No. 17 P. 1490-1492
The dynamics of a two-component Davydov-Scott (DS) soliton with a small mismatch of the initial location or velocity of the high-frequency (HF) component was investigated within the framework of the Zakharov-type system of two coupled equations for the HF and low-frequency (LF) fields. In this system, the HF field is described by the linear Schrödinger ...
Added: February 3, 2017
Evgeny Gromov, Malomed B., Chaos 2017 Vol. 27 No. 11 P. 113107-1-13107-13
New two-component soliton solutions of the coupled high-frequency (HF) - low-frequency (LF) system, based on Schrödinger - Korteweg - de Vries (KdV) system with the Zakharov's coupling, are obtained for arbitrary relative strengths of the nonlinearity and dispersion in the LF component. The complex HF field is governed by the linear Schrödinger equation with a ...
Added: October 24, 2017
Abrashkin A. A., Gromov E., Tyutin V. V., Труды НГТУ им. Р.Е. Алексеева 2010 № 1 (80) С. 36-42
Propagation of the short vector envelope solitons in a inhomogeneous medium with linear potential in coupled third–order nonlinear Shrodinger equations frame is considered. Explicit vector soliton solution is obtained. The explicit solution for the solitons trajectories is studied. In particular cases this solitons solution can be reduced as to the short scalar soliton solution on ...
Added: May 21, 2012
Yurin A., Вишняков Г. Н., Minaev V., Компьютерная оптика 2024 Т. 48 № 2 С. 225-230
Dispersion characteristics of optical glass are considered. An approach to research of dispersion characteristics of optical glass is proposed, requiring the measurement of the refractive index at only three wavelengths, which simplifies the measurement process compared with the use of the widely used Sellmeier equation. An approximation function for the refractive index of optical glass ...
Added: January 2, 2024
Madera A. G., Кандалов П., Прикладная информатика 2015 Т. 10 № 1(55) С. 106-113
Практика показывает, что температурные поля в реальных технических системах имеют неопределенный интервальный характер, что обусловливается интервально стохастической неопределенностью параметров системы. Однако математическое и компьютерное моделирование температурных полей осуществляется в настоящее время в предположении о их детерминированности и точно известных входных данных. В статье предлагается метод моделирования интервально стохастических температурных полей в технических системах. Применение метода ...
Added: August 17, 2015
Gromov E., Tyutin V. V., Aseeva N., Radiophysics and Quantum Electronics 2012 Vol. 55 No. 3 P. 184-197
We study interaction of different-polarization single-component vector solitons of the envelope function in anisotropic media within the framework of the system of two coupled third-order nonlinear SchrЁodinger equations which allow for the third-order linear dispersion, nonlinear dispersion, nonlinear cross-phase modulation, and cross-nonlinear dispersion. The regimes of mutual reflection, passage, and asymptotic approach of the solitons ...
Added: November 13, 2012
Aseeva N., Gromov E., Tyutin V. V., Physics Letters A 2007 No. 363 P. 411-413
The dynamics of short envelope solitons in media with controlled dispersion is investigated in the framework of the third-order nonlinear Schrödinger equation. Evolution of the solitons amplitude is analyzed in the adiabatic approximation. The existence of short envelope solitons independent from linear dispersion inhomogeneity is shown. ...
Added: June 9, 2012
Tager A., Solntsev V. A., Радиотехника и электроника 2011 Т. 56 № 4 С. 389-398
The effect of dielectric supports on the slowing factor and dispersion of the helical line in TWT is considered. A method for the calculation of the slowing down in the helical line with the complicated configuration of the dielectric supports is proposed. A procedure for the experimental study of dispersion in the helical slow_wave system ...
Added: April 12, 2012
Nazarov A., Блудов Д. А., Вихлянцев П. С. et al., Телекоммуникации 2015 № 2 С. 10-16
For probabilistic metric developed method experimental evaluation of the quality of services from the private offices of the state portals in the condition of uniformity of measurements and the formation of optimal plans, measurements with a given performance criterion of minimum amount of repeated measurements ...
Added: December 8, 2015
Кибзун А., Goryainova E. R., Наумов А. В., М. : Физматлит, 2014
Учебник предназначен для начального ознакомления с основами теории вероятностей и математической статистики и развития навыков решения практических задач.
Большое внимание уделено краткости изложения полного курса «Теории вероятностей и математической статистики», состоящего из теоретического и практического материала. Структура изложения максимально приближена к лекционным и практическим занятиям. Книга может одновременно играть роль учебника, задачника и справочника.
Учебник предназначен для ...
Added: December 18, 2014
Gromov E., Morozov V. P., Tyutin V. V., Труды НГТУ им. Р.Е. Алексеева 2010 № 4 (83) С. 40-49
The interaction of short single-component vector solitons in the frame of the coupled third–order nonlinear Schrodinger equations taking into account third–order linear dispersion, self–stepping, self–stimulated Ramanscattering, cross–stepping and cross–stimulated Raman-scattering terms is considered. Conditions of reflection and propagation of the solitons through each other and also the condition of oscillator interaction (vector breather) are obtained. ...
Added: May 21, 2012
Gromov E., Solycheva O. M., Tyutin V. V., Труды НГТУ им. Р.Е. Алексеева 2011 № 1 (86) С. 44-52
In the frame of the third-order nonlinear wave dispersion theory the equation of motion of a vector wave packets mass center taken in to account arbitrary inhomogeneity profile is obtained. As short vector wave packets localized motion as infinite motion is shown. Short vector wave packets localizations area can be as bigger as smaller in ...
Added: May 21, 2012
Kurkin A. A., Kurkina O. E., Rouvinskaya E. et al., Экологические системы и приборы 2013 Т. 10 С. 42-49
Экологическая безопасность водоемов требует детального знания возможных последствий экологических катастроф, возникающих при авариях судов, прорывов трубопроводов, случайных сбросов загрязняющих веществ в реки, озера и водохранилища. С этой целью необходим расчет волновых полей, генерируемых на поверхности и внутри водоема, покрытого слоем загрязняющего вещества (разливы мазута, нефти, керосина, машинного масла и т.п. жидких фракций). В работе изучаются ...
Added: November 7, 2013
Madera A. G., Программные продукты и системы 2014 № 4 С. 41-45
Практика показывает, что реальные температурные поля технических систем носят неопределенный интерваль-ный характер. Это обусловлено интервальным характером факторов, определяющих тепловой режим технической системы, а именно: параметрами конструкции технической системы, обладающими статистическим технологиче-ским разбросом изготовления; факторами, возникающими при функционировании технической системы (потреб-ляемые мощности, тепловые потоки, параметры внутренней среды); факторами окружающей среды (температуры среды, хладоносителей, скорости потоков и ...
Added: August 17, 2015
Sirotin V., Arkhipova M., Dubrova T. A. et al., Bielsko-Biala : University of Bielsko-Biala Press, 2016
The main attributes of modern enterprises should be the flexibility and the ability of forecasting the future. Constant adaptation to the changing environment and the rapidity of undertaking certain actions which are conditioned by specific situations determine the rules for the future position of market competition. Effective and efficient adjustment of the company in line ...
Added: November 2, 2016
Pahomov F., Известия РАН. Серия математическая 2016 Т. 80 № 6 С. 173-216
Полимодальная логика доказуемости
GLP была введена Г. К. Джапаридзе в 1986 г. Она является логикой доказуемости для ряда цепочек предикатов доказуемости возрастающей силы. Всякой полимодальной логике соответствует многообразие полимодальных алгебр. Л. Д. Беклемишевым и А. Виссером был поставлен вопрос о разрешимости элементарной теории свободной GLP-алгебры, порожденной константами 0, 1 [1]. В этой статье для любого натурального n решается аналогичный вопрос для логик GLPn, являющихся ...
Added: December 4, 2017
Furmanov K. K., Nikol'skii I. M., Computational Mathematics and Modeling 2016 Vol. 27 No. 2 P. 247-253
Added: December 22, 2016
Buchstaber V., Limonchenko I., / Cornell University. Series math "arxiv.org". 2018. No. 1808.08851.
We introduce the notions of algebraic and geometric direct families of polytopes and develop a theory of such families. The theory is then applied to the problem of existence of nontrivial higher Massey products in cohomology of moment-angle-complexes. ...
Added: September 29, 2019
Min Namkung, Younghun K., Scientific Reports 2018 Vol. 8 No. 1 P. 16915-1-16915-18
Sequential state discrimination is a strategy for quantum state discrimination of a sender’s quantum
states when N receivers are separately located. In this report, we propose optical designs that can
perform sequential state discrimination of two coherent states. For this purpose, we consider not
only binary phase-shifting-key (BPSK) signals but also general coherent states, with arbitrary prior
probabilities. Since ...
Added: November 16, 2020
Shiryaev A., Zhitlukhin M., Ziemba W., / SSRN. Series Social Science Research Network "Social Science Research Network". 2013.
We study the land and stock markets in Japan circa 1990. While the Nikkei stock average in the late 1980s and its -48% crash in 1990 is generally recognized as a financial market bubble, a bigger bubble and crash was in the golf course membership index market. The crash in the Nikkei which started on ...
Added: March 9, 2014
Maslov V., Теоретическая и математическая физика 2019 Т. 201 № 1 С. 65-83
We study the process of a nucleon separating from an atomic nucleus from the mathematical standpoint
using experimental values of the binding energy for the nucleus of the given substance. A nucleon becomes
a boson at the instant of separating from a fermionic nucleus. We study the further transformations of
boson and fermion states of separation in a ...
Added: November 1, 2019
Litvin Y. V., Абрамов И. В., Технологии техносферной безопасности 2016 № 66
Advanced approach to the assessment of a random time of arrival fire fighting calculation on the object of protection, the time of their employment and the free combustion. There is some quantitative assessments with the review of analytical methods and simulation ...
Added: August 27, 2016