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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">8308</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">Mean Field Green Function Solution of the Two-Band Hubbard Model in Cuprates</article-title><trans-title-group xml:lang="ru"><trans-title>Функции Грина для решения двухзонной модели Хаббарда в приближении среднего поля в купратах</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Adam</surname><given-names>Gh</given-names></name><name xml:lang="ru"><surname>Адам</surname><given-names>Георге</given-names></name></name-alternatives><bio xml:lang="en"> ; Joint Institute for Nuclear Research</bio><bio xml:lang="ru">Лаборатория информационных технологийНациональный институт физики и ядерной технологии им. Х. ХулубеяMaгурель-Бухарест, 077125, Румыния; Объединенный институт ядерных исследований</bio><email>adamg@jinr.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Adam</surname><given-names>S Anka</given-names></name><name xml:lang="ru"><surname>Адам</surname><given-names>Санда Анка</given-names></name></name-alternatives><bio xml:lang="en"> ; Joint Institute for Nuclear Research</bio><bio xml:lang="ru">Лаборатория информационных технологийНациональный институт физики и ядерной технологии им. Х. ХулубеяMaгурель-Бухарест, 077125, Румыния; Объединенный институт ядерных исследований</bio><email>adams@jinr.ru</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">Объединенный институт ядерных исследований</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2010-02-02" publication-format="electronic"><day>02</day><month>02</month><year>2010</year></pub-date><issue>2.2</issue><issue-title xml:lang="en">NO2.2 (2010)</issue-title><issue-title xml:lang="ru">№2.2 (2010)</issue-title><fpage>161</fpage><lpage>166</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 ©; 2010, Адам Г., Адам С.А.</copyright-statement><copyright-year>2010</copyright-year><copyright-holder xml:lang="ru">Адам Г., Адам С.А.</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/8308">https://journals.rudn.ru/miph/article/view/8308</self-uri><abstract xml:lang="en">The paper discusses the generalized mean ﬁeld solution of the Green function matrix of the eﬀective two-band two-dimensional Hubbard model of the high-Tc superconductivity in cuprates, as recently modiﬁed to include appropriate boundary conditions at zero doping. Two main results are found. (i) Hybridization of normal state energy levels preserves the center of gravity of the unhybridized levels. (ii) Hybridization of superconducting state energy levels displaces the center of gravity of the unhybridized normal levels. The whole spectrum is displaced towards lower frequencies.</abstract><trans-abstract xml:lang="ru">В работе рассматривается использование техники уравнения движения функций Грина для решения эффективной двухзонной модели Хаббарда высокотемпературной сверхпроводимости в приближении среднего поля в купратах, которая недавно была модифицирована авторами для включения надлежащих граничных условий при нулевом легировании. Получены два новых результата. 1. Гибридизация нормальных уровней состояния энергии сохраняет центр тяжести негибридизированных уровней. 2. Гибридизация энергетических уровней состояния сверхпроводимости смещает центр тяжести негибридизированных уровней. Весь спектр смещается в сторону более низких частот.</trans-abstract><kwd-group xml:lang="en"><kwd>high-Tc superconductivity</kwd><kwd>cuprates</kwd><kwd>two-band Hubbard model</kwd><kwd>Green function</kwd><kwd>mean ﬁeld approximation</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>высокотемпературная сверхпроводимость</kwd><kwd>купраты</kwd><kwd>двухзонная модель Хаббарда</kwd><kwd>функции Грина</kwd><kwd>приближение среднего поля</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Plakida N. M., Hayn R., Richard J.-L. Two-Band Singlet-Hole Model for the Copper Oxide Plane // Phys. Rev. B. - 1995. - Vol. 51. - Pp. 16599-16607.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Plakida N. M. 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