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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 pub-id-type="doi">10.17586/2220-8054-2018-9-3-342-348</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-785</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>Theoretical study of the slow light in the assembly of helium atoms</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>Petrashen</surname><given-names>A. G.</given-names></name></name-alternatives><bio xml:lang="en"><p>Kronverkskiy, 49, Saint Petersburg, 197101</p></bio><email xlink:type="simple">apetrashen@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>Sytenko</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>Kronverkskiy, 49, Saint Petersburg, 197101</p></bio><email xlink:type="simple">nsitenko@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="en">ITMO University<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>14</day><month>08</month><year>2025</year></pub-date><volume>9</volume><issue>3</issue><fpage>342</fpage><lpage>348</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Petrashen A.G., Sytenko N.V., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Petrashen A.G., Sytenko N.V.</copyright-holder><copyright-holder xml:lang="en">Petrashen A.G., Sytenko N.V.</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/785">https://nanojournal.ifmo.ru/jour/article/view/785</self-uri><abstract><p>The problem of solving light was installed about thirty years ago and was widely considered in different approximations. 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