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<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<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">vestnovsu</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Новгородского государственного университета</journal-title><trans-title-group xml:lang="en"><trans-title>Vestnik of Novgorod State University</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2076-8052</issn><publisher><publisher-name>Новгородский государственный университет имени Ярослава Мудрого</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.34680/2076-8052.2022.3(128).21-25</article-id><article-id custom-type="elpub" pub-id-type="custom">vestnovsu-13</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>Электроника</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Electronics</subject></subj-group></article-categories><title-group><article-title>Метод тензорных полей в теории линейного отклика</article-title><trans-title-group xml:lang="en"><trans-title>Tensor field method in the linear response theory</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>Зубков</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zubkov</surname><given-names>V. V.</given-names></name></name-alternatives><email xlink:type="simple">victor.v.zubkov@gmail.com</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>Майфат</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Mayfat</surname><given-names>D. A.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Яшкин</surname><given-names>К. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Yashkin</surname><given-names>K. Yu.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>Тверской государственный университет</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>18</day><month>09</month><year>2023</year></pub-date><volume>0</volume><issue>3(128)</issue><fpage>21</fpage><lpage>25</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Зубков В.В., Майфат Д.А., Яшкин К.Ю., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Зубков В.В., Майфат Д.А., Яшкин К.Ю.</copyright-holder><copyright-holder xml:lang="en">Zubkov V.V., Mayfat D.A., Yashkin K.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://vestnovsu.elpub.ru/jour/article/view/13">https://vestnovsu.elpub.ru/jour/article/view/13</self-uri><abstract><p>Предложен новый метод вычисления функций распределения, характеризующих степень неоднородности макроскопических сред. Введенные функции распределения строятся на основе процедуры сглаживания по определенному объему, величину которого можно выбирать достаточно произвольно, в зависимости от типа поставленной задачи. Показано, что функции распределения могут быть выражены в терминах локальных тензорных полей, использование которых упрощает процедуру замыкания иерархии кинетических уравнений благодаря прозрачному физическому смыслу тензорных полей. На основе предложенного метода рассмотрена задача линейного отклика и получено аналитическое выражение для реакции локальной плотности среды на малое внешнее механическое возмущение. Показано, что полученное выражение для распределения плотности совпадает с результатом расчетов, проведенных на основе производящего функционала в эргодическом приближеннии Вейля.</p></abstract><trans-abstract xml:lang="en"><p>A new method for calculating distribution functions characterizing the degree of heterogeneity of macroscopic media is proposed. The introduced distribution functions are based on the smoothing procedure for a certain volume. The volume value is selected depending on the task of the study. It is shown that the distribution functions can be expressed in terms of local tensor fields, the use of which simplifies the procedure for closing the hierarchy of kinetic equations due to the transparent physical meaning of tensor fields. Based on the proposed method, the linear response problem is considered and an analytical expression for the reaction of the local density of the medium to a small external mechanical disturbance has been obtained. It is shown that the derived expression for the density distribution coincides with the result of the calculations carried out on the basis of the generating functional in the ergodic Weyl approximation.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>кинетические уравнения</kwd><kwd>тензорные поля</kwd><kwd>стабильные межатомные потенциалы</kwd><kwd>линейный отклик</kwd></kwd-group><kwd-group xml:lang="en"><kwd>kinetic equations</kwd><kwd>tensor fields</kwd><kwd>stable interatomic potentials</kwd><kwd>linear response</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Мы признательны проф. А.Ю. Захарову за плодотворное обсуждение ряда вопросов, касающихся результатов представленных исследований.</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">Боголюбов Н.Н. Собрание научных трудов: в 12 т. Т.5: Статистическая механика. 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