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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 custom-type="elpub" pub-id-type="custom">najo-1092</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Quantum ring with wire: a model of two-particles problem</article-title><trans-title-group xml:lang="ru"><trans-title>Квантовое кольцо с проводником: модель двухчастичной задачи</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>Еремин</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Eremin</surname><given-names>D. A.</given-names></name></name-alternatives><email xlink:type="simple">ereminda@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><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. Yu.</given-names></name></name-alternatives><email xlink:type="simple">popov1955@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Мордовский государственный университет им. Н.П. Огарева<country>Россия</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Санкт-Петербургский государственный университет информационных технологий, механики и оптики<country>Россия</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2011</year></pub-date><pub-date pub-type="epub"><day>17</day><month>08</month><year>2025</year></pub-date><volume>2</volume><issue>2</issue><fpage>15</fpage><lpage>31</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Eremin D.A., Popov I.Y., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Еремин Д.А., Попов И.Ю.</copyright-holder><copyright-holder xml:lang="en">Eremin D.A., Popov I.Y.</copyright-holder><license 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/1092">https://nanojournal.ifmo.ru/jour/article/view/1092</self-uri><abstract><p>.</p></abstract><trans-abstract xml:lang="ru"><p>Построены операторы, описывающие поведение двух частиц с 𝛿−взаимодействием на прямой и в кольце. С помощью полученных операторов описана двухчастичная модель проводника с квантовым кольцом. Спектр полученного оператора численно исследован на наличие дополнительных точечных уровней. Проведено сравнение результата (при условии малой интенсивности взаимодействия между частицами) с результатом для аналогичной одночастичной задачи.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>уравнение Шредингера</kwd><kwd>симметрические операторы</kwd><kwd>теория Крейна</kwd><kwd>самосопряженные расширения</kwd><kwd>функция Грина</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Работа поддержана в рамках программ «Развитие научного потенциала высшей школы России» (проект 2.1.1/4215), «Научные и научно-педагогические кадры инновационной России» (контракты P689 NK-526P и 14.740.11.0879) и грантом 11-08-00267 РФФИ.</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">Melnikov Yu. B., Pavlov B. S. Two-body scattering on a graph and application to simple nanoelectronic devices // J. Math. Phys., 1995. V. 36. P. 2813–2825.</mixed-citation><mixed-citation xml:lang="en">Melnikov Yu. B., Pavlov B. S. Two-body scattering on a graph and application to simple nanoelectronic devices // J. Math. Phys., 1995. V. 36. P. 2813–2825.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Harmer M. Two particles on a star graph, I // J. Math. Phys., 2007. V. 14(4). P. 435–439.</mixed-citation><mixed-citation xml:lang="en">Harmer M. Two particles on a star graph, I // J. Math. Phys., 2007. V. 14(4). P. 435–439.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Harmer M. Two particles on a star graph, II // J.Math. Phys., 2008. V. 15(4). P. 473–480.</mixed-citation><mixed-citation xml:lang="en">Harmer M. Two particles on a star graph, II // J.Math. Phys., 2008. V. 15(4). P. 473–480.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Павлов Б. С. Теория расширений и явнорешаемые модели // УМН, 1987. V. 42(6). P. 99–131.</mixed-citation><mixed-citation xml:lang="en">Павлов Б. С. Теория расширений и явнорешаемые модели // УМН, 1987. V. 42(6). P. 99–131.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Exner P. Leaky quantum graphs: a review // Analysis on Graphs and its Applications, 2008. V. 77. P. 523–564.</mixed-citation><mixed-citation xml:lang="en">Exner P. Leaky quantum graphs: a review // Analysis on Graphs and its Applications, 2008. V. 77. P. 523–564.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Kurylev Ya. V. Boundary conditions on curves for the three-dimensional Laplace operator // J. Sov. Math., 1983. V. 22. P. 1072–1082.</mixed-citation><mixed-citation xml:lang="en">Kurylev Ya. V. Boundary conditions on curves for the three-dimensional Laplace operator // J. Sov. Math., 1983. V. 22. P. 1072–1082.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Exner P., Ichinose T. Geometrically induced spectrum in curved leaky wires // J. Phys. A: Math. Gen., 2001. V. 34. P. 1439–1450.</mixed-citation><mixed-citation xml:lang="en">Exner P., Ichinose T. Geometrically induced spectrum in curved leaky wires // J. Phys. A: Math. Gen., 2001. V. 34. P. 1439–1450.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Brasche J. F., Exner P., Kuperin Yu. A., Seba P. Schrodinger operators with singular interactions // J. Math. Anal. Appl., 1994. V. 184(1). P. 112–139.</mixed-citation><mixed-citation xml:lang="en">Brasche J. F., Exner P., Kuperin Yu. A., Seba P. Schrodinger operators with singular interactions // J. Math. Anal. Appl., 1994. V. 184(1). P. 112–139.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Popov I. Yu. The resonator with narrow slit and the model based on the operator extension theory // J. Math. Phys., 1992. V. 33(11). P. 3794–3801.</mixed-citation><mixed-citation xml:lang="en">Popov I. Yu. The resonator with narrow slit and the model based on the operator extension theory // J. Math. Phys., 1992. V. 33(11). P. 3794–3801.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Popov I. Yu. The extension theory and the opening in semitransparent surface // J. Math. Phys., 1992. V. 33(5). P. 1585–1589.</mixed-citation><mixed-citation xml:lang="en">Popov I. Yu. The extension theory and the opening in semitransparent surface // J. Math. Phys., 1992. V. 33(5). P. 1585–1589.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Exner P., Kondej S. Bound states due to a strong delta interaction supported by a curved surface // J. Phys. A, 2003. V. 36. P. 443–457.</mixed-citation><mixed-citation xml:lang="en">Exner P., Kondej S. Bound states due to a strong delta interaction supported by a curved surface // J. Phys. A, 2003. V. 36. P. 443–457.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Teta A. Quadratic forms for singular perturbations of the Laplacian // Res. Inst. Math. Sci., 1990. V. 26(5). P. 803–817.</mixed-citation><mixed-citation xml:lang="en">Teta A. Quadratic forms for singular perturbations of the Laplacian // Res. Inst. Math. Sci., 1990. V. 26(5). P. 803–817.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Лобанов И. С., Лоторейчик В. Ю., Попов И. Ю. Оценка снизу спектра двумерного оператора Шредингера с 𝛿-потенциалом на кривой // ТМФ, 2010. Т. 162(3). С. 397–407.</mixed-citation><mixed-citation xml:lang="en">Лобанов И. С., Лоторейчик В. Ю., Попов И. Ю. Оценка снизу спектра двумерного оператора Шредингера с 𝛿-потенциалом на кривой // ТМФ, 2010. Т. 162(3). С. 397–407.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Ikebe T., Shimada S. Spectral and scattering theory for the Schrodinger operators with penetrable wall potentials // J. Math. Kyoto Univ., 1991. V. 31(1). P. 219–258.</mixed-citation><mixed-citation xml:lang="en">Ikebe T., Shimada S. Spectral and scattering theory for the Schrodinger operators with penetrable wall potentials // J. Math. Kyoto Univ., 1991. V. 31(1). P. 219–258.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Суслина Т. А., Штеренберг Р. Г. Абсолютная непрерывность спектра оператора Шредингера с потенциалом, сосредоточенным на периодической системе гиперповерхностей // Алгебра и анализ, 2001. Т. 13. C. 197–240.</mixed-citation><mixed-citation xml:lang="en">Суслина Т. А., Штеренберг Р. Г. Абсолютная непрерывность спектра оператора Шредингера с потенциалом, сосредоточенным на периодической системе гиперповерхностей // Алгебра и анализ, 2001. Т. 13. C. 197–240.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Posilicano A. A Krein-like formula for singular perturbations of self-adjoint operators and applications // J. Func. Anal., 2001. V. 183. P. 109–147.</mixed-citation><mixed-citation xml:lang="en">Posilicano A. A Krein-like formula for singular perturbations of self-adjoint operators and applications // J. Func. Anal., 2001. V. 183. P. 109–147.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Прудников А. П. Интегралы и ряды / А. П. Прудников, Ю. А. Брычков, О. И. Марычев. — М.: Наука, 1981. — 800 с</mixed-citation><mixed-citation xml:lang="en">Прудников А. П. Интегралы и ряды / А. П. Прудников, Ю. А. Брычков, О. И. Марычев. — М.: Наука, 1981. — 800 с</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
