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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-1024</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>PHYSICS</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ФИЗИКА</subject></subj-group></article-categories><title-group><article-title>The absorption of electromagnetic radiation in a quantum wire</article-title><trans-title-group xml:lang="ru"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Karpunin</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>Saransk</p></bio><email xlink:type="simple">karpuninvv@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Margulis</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="en"><p>Saransk</p></bio><email xlink:type="simple">theorphysics@mrsu.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>Mordovian State Pedagogical Institute; Mordovian State University</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-2"><institution>Mordovian State University</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2014</year></pub-date><pub-date pub-type="epub"><day>15</day><month>08</month><year>2025</year></pub-date><volume>5</volume><issue>3</issue><fpage>378</fpage><lpage>383</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Karpunin V.V., Margulis V.A., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Karpunin V.V., Margulis V.A.</copyright-holder><copyright-holder xml:lang="en">Karpunin V.V., Margulis V.A.</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/1024">https://nanojournal.ifmo.ru/jour/article/view/1024</self-uri><abstract><p>The analytical expression for the absorption coefficient of the electromagnetic radiation by electrons a quantum wire is obtained. We used the first-order perturbation theory. The cases of linear and circular polarization of the electromagnetic wave are investigated. The resonance character of the absorption is shown and resonant frequencies are found.</p></abstract><kwd-group xml:lang="en"><kwd>quantum wire</kwd><kwd>electron-photon interaction</kwd><kwd>absorption coefficient</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The work was financially supported by Russian Ministry of Education and Science by the project 2.2.1.2. Research and development of educational laboratory “Basics of nanotechnology and scanning probe microscopy”.</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">Greshnov A. A., Zegrya G. G., Vasil’ev Yu. B., Suchalkin S. D., Mel’tser B. Ya., Ivanov S. V., Kop’ev P.S. 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