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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vestnikmephi</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник НИЯУ МИФИ</journal-title><trans-title-group xml:lang="en"><trans-title>Vestnik natsional'nogo issledovatel'skogo yadernogo universiteta "MIFI"</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2304-487X</issn><publisher><publisher-name>National Research Nuclear University "MEPhI"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26583/vestnik.2024.310</article-id><article-id custom-type="edn" pub-id-type="custom">PVZUYF</article-id><article-id custom-type="elpub" pub-id-type="custom">vestnikmephi-310</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МАТЕМАТИЧЕСКИЕ МОДЕЛИ И ЧИСЛЕННЫЕ МЕТОДЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATHEMATICAL MODELS AND NUMERICAL METHODS</subject></subj-group></article-categories><title-group><article-title>ЧИСЛЕННОЕ ИССЛЕДОВАНИЕ СОЛИТОННЫХ РЕШЕНИЙ НЕЛИНЕЙНОГО УРАВНЕНИЯ ШРЁДИНГЕРА С ТРЕМЯ НЕЛИНЕЙНОСТЯМИ</article-title><trans-title-group xml:lang="en"><trans-title>NUMERICAL STUDY OF SOLITON SOLUTIONS  OF THE CUBIC-QUINTIC-SEPTIC NONLINEAR SCHRÖDINGER EQUATION</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1198-4474</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Медведев</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Medvedev</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Магистр</p></bio><email xlink:type="simple">viktormedvedev12115551@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5926-9715</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кудряшов</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kudryashov</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор физико-математических наук, профессор;</p><p>главный научный сотрудник, заведующий кафедрой</p></bio><email xlink:type="simple">nakudr@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский ядерный университет «МИФИ»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>23</day><month>04</month><year>2024</year></pub-date><volume>13</volume><issue>2</issue><fpage>83</fpage><lpage>96</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Медведев В.А., Кудряшов Н.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Медведев В.А., Кудряшов Н.А.</copyright-holder><copyright-holder xml:lang="en">Medvedev V.A., Kudryashov N.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vestnikmephi.elpub.ru/jour/article/view/310">https://vestnikmephi.elpub.ru/jour/article/view/310</self-uri><abstract><p>Рассматривается задача распространения оптических импульсов, описываемая обобщенным уравнением Шрёдингера с нелинейными членами третьего, пятого и седьмого порядков. Методами неявных функций и простейших уравнений получено аналитическое решение в виде уединенной волны, и определены условия его существования. Представлена модификация метода Фурье для численного решения задачи распространения оптических импульсов при периодических граничных условиях. Численно исследован процесс распространения построенного оптического солитона. Дано сравнение аналитического решения с результатами численных расчетов. Изучен процесс распространения оптического солитона исследуемого уравнения при возмущении начальных данных. Выполнены расчеты распространения импульса в среде со случайным шумом. Показано, что полученное аналитическое решение устойчиво. Проанализировано влияние нелинейных членов пятой и седьмой степеней на распространение уединенных волн нелинейного уравнения Шрёдингера. Изучены процессы столкновения солитонов нелинейного уравнения Шрёдингера при влиянии нелинейных членов пятой и седьмой степеней. Показано, что столкновения носят неупругий характер.</p></abstract><trans-abstract xml:lang="en"><p>The problem of pulse propagation described by the nonlinear Schrödinger equation with non-Kerr nonlinearity of the third, fifth and seventh powers is considered. Optical solitons of the considered equation are found using simplest equations method and implicit functions method. The area of acceptable model parameters is illustrated. A modification of the split-step Fourier method is presented. Optical soliton propagation process is studied numerically. The validity of analytical calculations has been proven. The process of the interaction of a soliton pulse with a disturbance in the initial condition is analyzed. The process of the soliton pulse propogation in a medium with a random noise simulated. The stability of optical solitons of the cubic-quintic-septic nonlinear Schrodinger equation is proved. The influence of higher nonlinearity terms on the nonlinear Schrodinger equation solitary waves is studied. The soliton collisions in the presence of higher nonlinear terms are simulated. It is shown that in the presence of higher nonlinear terms, the solitons interact inelastically upon collision.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>обобщенное нелинейное уравнение Шрёдингера (НУШ)</kwd><kwd>псевдоспектральный метод Фурье</kwd><kwd>оптический солитон</kwd><kwd>численное моделирование</kwd><kwd>нелинейная оптика</kwd><kwd>нелинейные уравнения в частных производных</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Cubic-quintic-septic nonlinear Schrödinger equation</kwd><kwd>Split-step Fourier scheme</kwd><kwd>Optical soliton</kwd><kwd>Numerical modeling</kwd><kwd>Nonlinear optics</kwd><kwd>Nonlinear differential equations</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено за счет гранта Российского научного фонда № 23-41-00070, https://rscf.ru/project/23-41-00070/</funding-statement><funding-statement xml:lang="en">The study was supported by a grant from the Russian Science Foundation No. 23-41-00070, https://rscf.ru/project/23-41-00070/</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Lake B.M, Yuen H.C., Rungaldier H., Ferguson W.E. 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