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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">npe</journal-id><journal-title-group><journal-title xml:lang="ru">Ядерная физика и инжиниринг</journal-title><trans-title-group xml:lang="en"><trans-title>Nuclear Physics and Engineering</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2079-5629</issn><issn pub-type="epub">2079-5637</issn><publisher><publisher-name>МИФИ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.1134/S2079562920040119</article-id><article-id custom-type="elpub" pub-id-type="custom">npe-64</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>Математическое моделирование в ядерных технологиях</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Mathematical Modeling in Nuclear Technologies</subject></subj-group></article-categories><title-group><article-title>О распаде сильного скалярного поля в КМ и КТП</article-title><trans-title-group xml:lang="en"><trans-title>On the Strong Scalar Field Decay in QM and QFT</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>Ланина</surname><given-names>Е. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Lanina</surname><given-names>E. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>141701; Московская область; Долгопрудный; 117218; Москва</p></bio><bio xml:lang="en"><p>141701; Moscow oblast; Dolgoprudnyi; 117218; Moscow</p></bio><email xlink:type="simple">lanina.lena@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>Трунин</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Trunin</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>141701; Московская область; Долгопрудный; 117218;  Москва</p></bio><bio xml:lang="en"><p>141701; Moscow oblast; Dolgoprudnyi; 117218; Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ахмедов</surname><given-names>Э. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Akhmedov</surname><given-names>E. T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>141701; Московская область; Долгопрудный; 117218; Москва</p></bio><bio xml:lang="en"><p>141701; Moscow oblast; Dolgoprudnyi; 117218; Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Московский физико-технический институт (национальный исследовательский университет); Институт теоретической и экспериментальной физики им. А.И. Алиханова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow Institute of Physics and Technology (National Research University; Alikhanov Institute for Theoretical and Experimental Physics, National Research Center “Kurchatov Institute”</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>22</day><month>04</month><year>2024</year></pub-date><volume>11</volume><issue>4</issue><fpage>216</fpage><lpage>218</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ланина Е.Н., Трунин Д.А., Ахмедов Э.Т., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Ланина Е.Н., Трунин Д.А., Ахмедов Э.Т.</copyright-holder><copyright-holder xml:lang="en">Lanina E.N., Trunin D.A., Akhmedov E.T.</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://npe.elpub.ru/jour/article/view/64">https://npe.elpub.ru/jour/article/view/64</self-uri><abstract><p>   Сначала рассматривается случай (0 + 1)-мерной неравновесной квантовой механики на примере модели Юкавы во внешнем скалярном поле φcl (t) = m/L+a/L*t. Показывается, что точные фермионные пропагаторы не меняются со временем, а рост бозонных пропагаторов определяется вкладом в квантовое среднее поля и отвечает так называемым диаграммам типа “головастик”. Затем рассматривается теория Юкавы взаимодействующего массивного дираковского поля и безмассового действительного скалярного поля в (1 + 1)-мерном пространстве Минковского с сигнатурой (+1, –1). В этой теории находятся сначала классический ток, а затем и квантовые поправки для дираковского поля во внешнем зависящем от координаты скалярном поле с взаимодействием Юкавы. Изучается отклик рождения пар фермионов на внешнее линейно зависящее от координаты бозонное поле.</p></abstract><trans-abstract xml:lang="en"><p>   First, the case of (0 + 1)-dimensional nonequilibrium quantum mechanics is considered by solving the Yukawa model in an external scalar field φcl (t) = m/L+a/L*t. It is shown that the exact fermion propagators do not change with time, and the growth of bosonic propagators is determined by the contribution to the quantum average of the field and corresponds to the so-called “tadpole” diagrams. Then, the Yukawa theory of the interacting massive Dirac field and the massless real scalar field in the (1 + 1)-dimensional Minkowski space with the signature (+1, –1) is considered. In this theory we first calculate a classical current, and then quantum corrections for the Dirac field in an external coordinate-dependent scalar field with Yukawa interaction. We study the response of the production of fermion pairs to an external bosonic field linearly dependent on the coordinate.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>модель Юкавы</kwd><kwd>скалярное поле</kwd><kwd>фермионное поле</kwd><kwd>пропагатор</kwd><kwd>квантовое среднее</kwd><kwd>функция Грина</kwd><kwd>диаграммная техника Швингера–Келдыша</kwd><kwd>теория возмущений</kwd><kwd>населенность энергетических уровней</kwd><kwd>аномальное квантовое среднее</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Yukawa model</kwd><kwd>scalar field</kwd><kwd>fermionic field</kwd><kwd>propagator</kwd><kwd>quantum mean</kwd><kwd>Green’s function</kwd><kwd>Schwinger−Keldysh diagram technique</kwd><kwd>perturbation theory</kwd><kwd>level population</kwd><kwd>anomalous quantum mean</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Kamenev A. 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