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Уравнение типа Хартри с потенциалом взаимодействия Юкавы в квазиклассическом приближении
Вестник Московского энергетического института. 2010. № 6. С. 99-109.
Pereskokov A., Липская А. В.
Keywords: quantizationpivot pointточка поворотаsemiclassical approximationself-consistent potentialasymptotic eigenvalues and eigenfunctionsквазиклассическое приближениеправило квантованиясамосогласованный потенциаласимптотические собственные значения и собственные функцииматематические модели гравитации и космологииасимптотическое поведение решений
Pereskokov A., Липская А. В., Вестник Московского энергетического института 2011 № 6 С. 30
Рассмотрены радиально-симметричные решения уравнения типа Хартри, содержащего интегральную нелинейность с потенциалом взаимодействия Юкавы, а также кулоновский потенциал. В квазиклассическом приближении выведена и исследована система уравнений для самосогласованного потенциала. Выписано правило квантования типа Бора-Зоммерфельда. Найдены асимптотические собственные значения и собственные функции, локализованные в шаре. ...
Added: December 16, 2012
Pereskokov A., Труды Московского математического общества 2012 Т. 73 № 2 С. 277-325
Рассматривается задача об эффекте Зеемана во втором порядке по магнитному полю с использованием неприводимых представлений алгебры с квадратичными коммутационными соотношениями Карасева-Новиковой. Каждому представлению этой алгебры соответствует спектральный кластер вокруг уровня энергии невозмущенного атома водорода. На примере этой модели излагается общий метод построения асимптотических решений вблизи границ спектральных кластеров с помощью нового интегрального представления. Изучена задача ...
Added: December 22, 2012
Pereskokov A., Липская А. В., Вестник Московского энергетического института 2012 № 6 С. 105-116
Рассмотрена задача на собственные значения для одномерного уравнения Хартри, содержащего интегральную нелинейность с негладким потенциалом взаимодействия. Найдены асимптотические собственные значения и собственные функции, локализованные вблизи точки. Изучена задача вычисления средних значений дифференциальных операторов на решениях. ...
Added: December 31, 2012
A. V. Pereskokov, Journal of Mathematical Sciences 2023 Vol. 276 No. 1 P. 154-167
We consider the eigenvalue problem for the Hartree operator with a small nonlinearity
coefficient. We find asymptotic eigenvalues and asymptotic eigenfunctions localized near
a sphere. We obtain asymptotic expansions of self-consistent potentials. ...
Added: December 12, 2023
Pereskokov A., Математические заметки 2012 Т. 92 № 4 С. 583-596
The eigenvalue problem for the perturbed resonant oscillator is considered. A method for constructing asymptotic solutions near the boundaries of spectral clusters using a new integral representation is proposed. The problem of calculating the averaged values of differential operators on solutions near the cluster boundaries is studied. ...
Added: November 26, 2012
Vakhrameeva D. A., Pereskokov A. V., Journal of Mathematical Sciences 2020 Vol. 247 No. 6 P. 820-849
We study the spectral problem for a two-dimensional Hartree type operator with smooth selfaction potential. We find
asymptotic eigenvalues and eigenfunctions and construct an asymptotic expansion for quantum averages near
the lower boundaries of spectral clusters. ...
Added: June 22, 2020
Vybornyi E., Наноструктуры. Математическая физика и моделирование 2015 Т. 13 № 2 С. 43-54
We conceder semiclassical asymptotics of the energy levels shift of the Schrödinger operator discrete spectrum with a one-dimensional single-well potential that appears due to a deformation of the potential in the classically forbidden region. Since such a deformation of the potential effects on the quantum particle only due to the tunneling effects, then the corresponding ...
Added: February 18, 2016
Vybornyi E., Theoretical and Mathematical Physics 2014 Vol. 181 No. 2 P. 1418-1427
We propose an operator method for calculating the semiclassical asymptotic form of the energy splitting value in the general case of tunneling between symmetric orbits in the phase space. We use this approach in the case of a particle on a circle to obtain the asymptotic form of the energy tunneling splitting related to the ...
Added: August 5, 2014
Karasev M., Russian Journal of Mathematical Physics 2012 Vol. 19 No. 3 P. 299-306
For the Dirac 2D-operator in a constant magnetic field with perturbing electric potential, we derive Hamiltonians describing the quantum quasiparticles (Larmor vortices) at Landau levels. The discrete spectrum of this Hall-effect quantum Hamiltonian can be computed to all orders of the semiclassical approximation by a deformed Planck-type quantization condition on the 2D-plane; the standard magnetic (symplectic) ...
Added: December 19, 2012
A. V. Pereskokov, Journal of Mathematical Sciences 2017 Vol. 226 No. 4 P. 517-530
We consider the eigenvalue problem for a two-dimensional perturbed resonance oscillator. The role of perturbation is played by an integral Hartree type nonlinearity, where the selfaction potential depends on the distance between points and has logarithmic singularity. We obtain asymptotic eigenvalues near the upper boundaries of spectral clusters appeared near eigenvalues of the unperturbed operator. ...
Added: December 21, 2017
A. V. Pereskokov, Journal of Mathematical Sciences 2017 Vol. 226 No. 4 P. 462-516
We study the nonlinear eigenvalue problem for two-dimensional Hartree type equations with selfaction potentials possessing logarithmic singularity and depending on the distance between points. To find a series of asymptotic eigenvalues, we derive a counterpart of the Bohr–Sommerfeld quantization rule. The corresponding asymptotic eigenfunctions are localized near a plane segment. ...
Added: December 20, 2017
Karasev M., Vybornyi E., / Cornell University. Series "Working papers by Cornell University". 2014. No. 1411.4436.
We consider the one-dimensional Schr\"{o}dinger operator in the semiclassical regime assuming that its double-well potential is the sum of a finite "physically given" well and a square shape probing well whose width or depth can be varied (tuned). We study the dynamics of initial state localized in the physical well. It is shown that if ...
Added: November 18, 2014
Vybornyi E., Наноструктуры. Математическая физика и моделирование 2015 Т. 12 № 1 С. 5-84
We consider the problem of constructing semiclassical asymptotic expansions of discrete spectrum and the corresponding stationary states of one-dimensional Schrödinger operator in the case of resonance tunneling. We consider two basic models: tunneling in an asymmetric double-well potential on a line and momentum tunneling of a particle in a potential field on a circle. For ...
Added: February 12, 2016
Pereskokov A., Теоретическая и математическая физика 2016 Т. 187 № 1 С. 74-87
We consider an eigenvalue problem for the fwo-dimensional Hartree operator with a small parameter at
the nonlinearity. We obtain the asymptotic eigenvalues and the asymptotic eigenfunctions near the upper
boundaries of the spectral clusters formed near the energy levels of the unperturbed operator and construct
an asymptotic expansion around the circle where the solution is localized. ...
Added: April 18, 2016
Vologodsky V., Finkelberg M. V., Bezrukavnikov R., Cambridge Journal of Mathematics 2014 Vol. 2 No. 2 P. 163-190
Marc Haiman has reduced Macdonald Positivity Conjecture to a statement about geometry of the Hilbert scheme of points on the plane, and formulated a generalization of the conjecture where the symmetric group is replaced by the wreath product of S_n and Z/rZ. He has proven the original conjecture by establishing the geometric statement about the ...
Added: December 17, 2015
Karasev M., Novikova E., Vybornyi E., Mathematical notes 2016 Vol. 100 No. 6 P. 807-819
We describe how a top-like quantum Hamiltonian over a non-Lie algebra appears in the model of the planar Penning trap under breaking its axial symmetry (inclination of the magnetic field) and turning parameters (electric voltage, magnetic field strength and inclination angle) at double resonance. For eigenvalues of the quantum non-Lie top, under a specific variation ...
Added: October 22, 2016
Pereskokov A., Journal of Mathematical Sciences 2022 Vol. 264 No. 5 P. 617-632
We consider the spectral problem for a perturbed two-dimensional oscillator. The role of a perturbation is played by an integral Hartree type nonlinearity with a self-action potential depending on the distance between points and possessing a Coulomb singularity. We find asymptotic eigenvalues and eigenfunctions near boundaries of spectral clusters appearing near eigenvalues of the unperturbed ...
Added: October 24, 2022
D. A. Vakhrameeva, A. V. Pereskokov, Theoretical and Mathematical Physics 2019 Vol. 199 No. 3 P. 864-877
We consider the eigenvalue problem for a perturbed two-dimensional oscillator where the perturbation is an
integral Hartree-type nonlinearity with a Coulomb self-action potential. We obtain asymptotic eigenvalues
and asymptotic eigenfunctions near the lower boundaries of spectral clusters formed in a neighborhood of
the eigenvalues of the unperturbed operator and construct an asymptotic expansion near a circle where
the solution ...
Added: May 28, 2019
Karasev M., Russian Journal of Mathematical Physics 2016 Vol. 23 No. 2 P. 207-218
A geometric construction of the ` ala Planck action integral (quantization rule)
determining adiabatic terms for fast-slow systems is considered. We demonstrate that in
the first (after zero) adiabatic approximation order, this geometric rule is represented by a
deformed fast symplectic 2-form. The deformation is controlled by the noncommutativity
of the slow adiabatic parameters. In the case of one ...
Added: April 4, 2016
Vybornyi E., Theoretical and Mathematical Physics 2014 Vol. 178 No. 1 P. 93-114
We consider the one-dimensional stationary Schr¨odinger equation with a smooth double-well potential. We obtain a criterion for the double localization of wave functions, exponential splitting of energy levels, and the tunneling transport of a particle in an asymmetric potential and also obtain asymptotic formulas for the energy splitting that generalize the well-known formulas to the ...
Added: December 23, 2013
Romanov A., Известия РАН. Серия математическая 2006 Т. 70 № 5 С. 163-178
<img /> Для эволюционных уравнений параболического типа c гильбертовым фазовым пространством E рассмотрена проблема эффективной (с липшицевой оценкой) конечной параметризации множеств K в E функционалами из E*, или, в иных терминах, проблема линейного липшицева вложения K в конечномерное евклидово пространство. Если K - глобальный аттрактор уравнения, то такого рода параметризация оказывается равносильной конечномерности динамики на K. Получен ряд признаков параметризации (в различных ...
Added: December 6, 2012
Толченников А. А., В.Л. Чернышев, Шафаревич А. И., Наноструктуры. Математическая физика и моделирование 2014 Т. 11 № 2 С. 75-104
Уравнения Шрёдингера на геометрических графах изучаются, начиная с 30-х годов прошлого века; изначально они использовались в модели свободных электронов в органических молекулах. В последние тридцать лет теория дифференциальных уравнений на графах активно развивается в различных направлениях; одно из них --- обобщение уравнений Шрёдингера на так называемые декорированные графы --- пространства, получаемые из графов заменой вершин ...
Added: December 8, 2014
Bruning J., Grushin V. V., Dobrokhotov S. Y., Russian Journal of Mathematical Physics 2012 Vol. 19 No. 3 P. 261-272
In the paper, using relatively simple formulas derived in the abstract perturbation theory of selfadjoint operators, we obtain explicit asymptotic formulas for a family of elliptic operators of Laplace type that arise in linear problems with rapidly oscillating coefficients. ...
Added: December 24, 2012
Takasaki K., Takebe T., Теоретическая и математическая физика (Российская Федерация) 2012 Vol. 171 No. 2 P. 683-690
We briefly review a recursive construction of hbar-dependent solutions of the Kadomtsev-Petviashvili hierarchy. We give recurrence relations for the coefficients X_n of an ħ-expansion of the operator X = X_0 + hbar X_1 + hbar^2 X_2 + ... for which the dressing operator W is expressed in the exponential form W = exp(X/hbar). The wave ...
Added: June 22, 2012