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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="research-article" 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">40103</article-id><article-id pub-id-type="doi">10.22363/2658-4670-2024-32-1-99-105</article-id><article-id pub-id-type="edn">BXKOPH</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>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Computer studies of a dependence of equilibrium state structure on a number of particles for a two-dimensional system of charged particles confined in a disk potential</article-title><trans-title-group xml:lang="ru"><trans-title>Компьютерные исследования зависимости от числа частиц структуры основного состояния двумерной системы заряженных частиц ограниченных круговым потенциалом</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7162-0344</contrib-id><contrib-id contrib-id-type="scopus">6603099928</contrib-id><contrib-id contrib-id-type="researcherid">C-4841-2016</contrib-id><name-alternatives><name xml:lang="en"><surname>Nikonov</surname><given-names>Eduard G.</given-names></name><name xml:lang="ru"><surname>Никонов</surname><given-names>Э. Г.</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Physical and Mathematical Sciences, Head of Sector MLIT JINR</p></bio><email>e.nikonov@jinr.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nazmitdinov</surname><given-names>Rashid G.</given-names></name><name xml:lang="ru"><surname>Назмитдинов</surname><given-names>Р. Г.</given-names></name></name-alternatives><bio xml:lang="en">Doctor of Physical and Mathematical Sciences, Leading Researcher BLTP JINR</bio><email>rashid@theor.jinr.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0005-6424-4455</contrib-id><name-alternatives><name xml:lang="en"><surname>Glukhovtsev</surname><given-names>Pavel I.</given-names></name><name xml:lang="ru"><surname>Глуховцев</surname><given-names>П. И.</given-names></name></name-alternatives><bio xml:lang="en"><p>Master’s degree student of Department of distributed information computing systems of Dubna State University</p></bio><email>pavelgl2018@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Joint Institute for Nuclear Research</institution></aff><aff><institution xml:lang="ru">Объединенный иститут ядерных исследований</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Dubna State University</institution></aff><aff><institution xml:lang="ru">Государственный университет «Дубна»</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">HSE University</institution></aff><aff><institution xml:lang="ru">Национальный исследовательский университет «Высшая школа экономики»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-06-30" publication-format="electronic"><day>30</day><month>06</month><year>2024</year></pub-date><volume>32</volume><issue>1</issue><issue-title xml:lang="en">VOL 32, NO1 (2024)</issue-title><issue-title xml:lang="ru">ТОМ 32, №1 (2024)</issue-title><fpage>99</fpage><lpage>105</lpage><history><date date-type="received" iso-8601-date="2024-07-19"><day>19</day><month>07</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Nikonov E.G., Nazmitdinov R.G., Glukhovtsev P.I.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Никонов Э.Г., Назмитдинов Р.Г., Глуховцев П.И.</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Nikonov E.G., Nazmitdinov R.G., Glukhovtsev P.I.</copyright-holder><copyright-holder xml:lang="ru">Никонов Э.Г., Назмитдинов Р.Г., Глуховцев П.И.</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/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/miph/article/view/40103">https://journals.rudn.ru/miph/article/view/40103</self-uri><abstract xml:lang="en"><p>The problem of finding equilibrium configurations of one-component charged particles, induced by externalelectrostaticfieldsinplanarsystems,isasubjectofactivestudiesinfundamentalaswellinexperimental investigations. In this paper the results of numerical analysis of the equilibrium configurations of charged particles (electrons), confined in a circular region by an infinite external potential at its boundary are presented. Equilibrium configurations with minimal energy are searched by means of special calculation scheme. This computational scheme consists of the following steps. First, the configuration of the system with the energy as close as possible to the expected energy value in the ground equilibrium state is found using a model of stable configurations. Next, classical Newtonian molecular dynamics is used using viscous friction to bring the system into equilibrium with a minimum energy. With a sufficient number of runs, we obtain a stable configuration with an energy value as close as possible to the global minimum energy value for the ground stable state for a given number of particles. Our results demonstrate a significant efficiency of using the method of classical molecular dynamics (MD) when using the interpolation formulas in comparison with algorithms based on Monte Carlo methods and global optimization. This approach makes it possible to significantly increase the speed at which an equilibrium configuration is reached for an arbitrarily chosen number of particles compared to the Metropolis annealing simulation algorithm and other algorithms based on global optimization methods</p></abstract><trans-abstract xml:lang="ru"><p>Проблема нахождения равновесных конфигураций однокомпонентных заряженных частиц, индуцированных внешними электростатическими полями в планарных системах, является предметом активных исследований как в фундаментальных, так и в экспериментальных исследованиях. В данной работе представлены результаты численного анализа равновесных конфигураций заряженных частиц (электронов), удерживаемых в круговой области бесконечным внешним потенциалом на ее границе. Равновесные конфигурации с минимальной энергией ищутся с помощью специальной схемы расчета. Данная вычислительная схема состоит из следующих шагов. Сначала с помощью стационарной модели находится конфигурация системы с энергией, максимально близкой к ожидаемому значению энергии в основном состоянии равновесия. Далее используется классическая ньютоновская молекулярная динамикасиспользованиемвязкоготрения,чтобыпривестисистемувравновесиесминимальнойэнергией. При достаточном количестве прогонов мы получаем устойчивую конфигурацию со значением энергии, максимально близким к глобальному минимальному значению энергии для основного устойчивого состояния для заданного числа частиц. Наши результаты демонстрируют значительную эффективность использования метода классической молекулярной динамики (МД) при использовании интерполяционных формул по сравнению с алгоритмами, основанными на методах Монте-Карло и глобальной оптимизации. Такой подход позволяет существенно повысить скорость достижения равновесной конфигурации для произвольно выбранного числа частиц по сравнению с алгоритмом моделирования отжига Метрополиса и другими алгоритмами, основанными на методах глобальной оптимизации</p></trans-abstract><kwd-group xml:lang="en"><kwd>Thomson atom</kwd><kwd>Wigner crystal</kwd><kwd>molecular dynamics</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>атом Томсона</kwd><kwd>кристалл Вигнера</kwd><kwd>молекулярная динамика</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The work was supported within the framework of the Joint Institute for Nuclear Research project no. 05-6-1118-&#13;
&#13;
2014/2023 with the use of resources of the HybriLIT heterogeneous cluster of the Laboratory of Information Technologies,&#13;
&#13;
Joint Institute for Nuclear Research. Work by E.G.N. partially supported by the Basic Research Program of the National Research University “Higher School of Economics”.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Bowick, M. J. &amp; Giomi, L. Two-dimensional matter: order, curvature and defects. Advances in Physics 58, 449-563. doi:10.1080/00018730903043166 (2009).</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Saarikoski, H., Reimann, S. M., Harju, A. &amp; Manninen, M. Vortices in quantum droplets: Analogies between boson and fermion systems. Rev. Mod. Phys. 82, 2785-2834. doi:10.1103/RevModPhys.82.2785 (3 Sept. 2010).</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Birman, J., Nazmitdinov, R. &amp; Yukalov, V. Effects of symmetry breaking in finite quantum systems. 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