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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">najo</journal-id><journal-title-group><journal-title xml:lang="en">Nanosystems: Physics, Chemistry, Mathematics</journal-title><trans-title-group xml:lang="ru"><trans-title>Наносистемы: физика, химия, математика</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-8054</issn><issn pub-type="epub">2305-7971</issn><publisher><publisher-name>Университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17586/2220-8054-2024-15-2-155-159</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-29</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="en"><subject>MATHEMATICS</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МАТЕМАТИКА</subject></subj-group></article-categories><title-group><article-title>Mathematical model of weakly coupled spherical resonator chains under the influence of external magnetic field</article-title><trans-title-group xml:lang="ru"><trans-title>Математическая модель слабосвязанных цепочек сферических резонаторов под действием внешнего магнитного поля</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мелихова</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Melikhova</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="en"><p>Alina S. Melikhova – Center of Mathematics, ITMO University.</p><p>Kroverkskiy, 49, St. Petersburg, 197101</p></bio><email xlink:type="simple">alina.s.melikhova@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/0000-0001-7137-4067</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Попов</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Popov</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="en"><p>Anton I. Popov – Center of Mathematics, ITMO University.</p><p>Kroverkskiy, 49, St. Petersburg, 197101</p></bio><email xlink:type="simple">popov239@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/0000-0003-2115-2479</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Блинова</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Blinova</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>Irina V. Blinova – Center of Mathematics, ITMO University.</p><p>Kroverkskiy, 49, St. Petersburg, 197101</p></bio><email xlink:type="simple">irin-a@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5251-5327</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Попов</surname><given-names>И. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Popov</surname><given-names>I. Y.</given-names></name></name-alternatives><bio xml:lang="en"><p>Igor Y. Popov – Center of Mathematics, ITMO University.</p><p>Kroverkskiy, 49, St. Petersburg, 197101</p></bio><email xlink:type="simple">popov1955@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>ITMO University</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>31</day><month>05</month><year>2025</year></pub-date><volume>15</volume><issue>2</issue><fpage>155</fpage><lpage>159</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Melikhova A.S., Popov A.I., Blinova I.V., Popov I.Y., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Мелихова А.С., Попов А.И., Блинова И.В., Попов И.Ю.</copyright-holder><copyright-holder xml:lang="en">Melikhova A.S., Popov A.I., Blinova I.V., Popov I.Y.</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://nanojournal.ifmo.ru/jour/article/view/29">https://nanojournal.ifmo.ru/jour/article/view/29</self-uri><abstract><p>The Schrödinger operators with constant magnetic field in a bent chain and Y-type chain of coupled balls are considered. Coupling exists due to point-like openings at the touching points of neighbor spheres. The mathematical background of the model is the theory of self-adjoint extensions of symmetric operators. The spectral equations for the model operators in each case were derived and analyzed.</p></abstract><trans-abstract xml:lang="ru"><p>Рассмотрены операторы Шредингера с постоянным магнитным полем в изогнутой цепочке и цепочке связанных шаров Y-типа. Связь существует за счет точечных отверстий в точках соприкосновения соседних сфер. Математической основой модели является теория самосопряженных расширений симметричных операторов. Выведены и проанализированы спектральные уравнения для модельных операторов в каждом случае.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>спектр</kwd><kwd>теория операторных расширений</kwd><kwd>цепочка из шаров</kwd><kwd>магнитное поле</kwd></kwd-group><kwd-group xml:lang="en"><kwd>spectrum</kwd><kwd>operator extensions theory</kwd><kwd>balls chain</kwd><kwd>magnetic field</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The work was supported by Russian Science Foundation (grant number 23-21-00096 (https://rscf.ru/en/project/23-21-00096/)).</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">Smith, Brian W., Monthioux, Marc, Luzzi, David E. Carbon nanotube encapsulated fullerenes: A unique class of hybrid materials. 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