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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Discrete and Continuous Models and Applied Computational Science</journal-id><journal-title-group><journal-title xml:lang="en">Discrete and Continuous Models and Applied Computational Science</journal-title><trans-title-group xml:lang="ru"><trans-title>Discrete and Continuous Models and Applied Computational Science</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2658-4670</issn><issn publication-format="electronic">2658-7149</issn><publisher><publisher-name xml:lang="en">Peoples' Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">8489</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Multi-Layer Schemes for Solving the Time-Dependent Shr.odinger Equation</article-title><trans-title-group xml:lang="ru"><trans-title>Многослойные схемы для численного решениянестационарного уравнения Шрёдингера</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Chuluunbaatar</surname><given-names>O</given-names></name><name xml:lang="ru"><surname>Чулуунбаатар</surname><given-names>О</given-names></name></name-alternatives><bio xml:lang="en">Joint Institute for Nuclear Research</bio><bio xml:lang="ru">Объединённый институт ядерных исследований</bio><email>-</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Joint Institute for Nuclear Research</institution></aff><aff><institution xml:lang="ru">Объединённый институт ядерных исследований</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2008-01-15" publication-format="electronic"><day>15</day><month>01</month><year>2008</year></pub-date><issue>1</issue><issue-title xml:lang="en">NO1 (2008)</issue-title><issue-title xml:lang="ru">№1 (2008)</issue-title><fpage>43</fpage><lpage>53</lpage><history><date date-type="received" iso-8601-date="2016-09-08"><day>08</day><month>09</month><year>2016</year></date></history><permissions><copyright-statement xml:lang="ru">Copyright ©; 2008, Чулуунбаатар О.</copyright-statement><copyright-year>2008</copyright-year><copyright-holder xml:lang="ru">Чулуунбаатар О.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/miph/article/view/8489">https://journals.rudn.ru/miph/article/view/8489</self-uri><abstract xml:lang="en">The algorithm based on unitary evolution operator decomposition to generate in a
MAPLE and REDUCE packages multi-layer implicit schemes for numerical solving the
time-dependent Shroedinger equation is presented. The optimal methods for construction
of additional gauge transformations to extract symmetric operators needed for generation
economical algebraic evolution schemes with respect to spatial variables by the finite element
method are studied. The efficiency of the developed computational schemes till sixth
order with respect to the time step and till seven order with respect to the spatial step, are
demonstrated on the integrable model of oscillator in a time-dependent external field.
            </abstract><trans-abstract xml:lang="ru">Представлен алгоритм генерации в среде MAPLE и REDUCE многослойных неявных схем для численного решения нестационарного уравнения Шрёдингера на основе факторизации унитарного оператора эволюции. Исследуются оптимальные методы построения дополнительных калибровочных преобразований, позволяющие выделять симметричные операторы, необходимые для генерации экономичных алгебраических эволюционных схем по пространственной переменной методом конечных элементов. Эф-
фективность сгенерированных схем до шестого порядка точности по шагу временной переменной и до седьмого порядка точности по шагу пространственной переменной демонстрируется численным анализом интегрируемой модели осциллятора во внешнем
поле, зависящем от времени
            </trans-abstract><kwd-group xml:lang="ru"><kwd>нестационарное уравнение Шрёдингера</kwd><kwd>задача Коши</kwd><kwd>разложение оператора эволюции</kwd><kwd>калибровочные преобразования</kwd><kwd>операторно-разностные многослойные схемы</kwd><kwd>метод конечных элементов</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Coulomb-Volkov approach of atom ionization by intense and ultrashort laser pulses / G. Duchateau, E. Cormier, H. Bachau, R. Gayet // Phys. Rev. A. - Vol. 63. - 2001. - Pp. 053411-1-53411-11.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Butkovskiy A. G., Samoilenko Y. I. Control of Quantum-Mechanical Processes and Systems. - Dordrecht Hardbound: Kluwer Academic Publishers, 1990.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Киржниц Д. А. 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