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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">zhps</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал прикладной спектроскопии</journal-title><trans-title-group xml:lang="en"><trans-title>Zhurnal Prikladnoii Spektroskopii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0514-7506</issn><publisher><publisher-name>B. I. Stepanov Institute of Physics of the National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">zhps-1762</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>ПРИБОРЫ И МЕТОДЫ СПЕКТРОСКОПИИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>DEVICES AND METHODS OF SPECTROSCOPY</subject></subj-group></article-categories><title-group><article-title>Минимизация времени смешивания в цепочках Руднера–Левитова оптимизацией начального состояния</article-title><trans-title-group xml:lang="en"><trans-title>MINIMIZATION OF MIXING TIME IN RUDNER–LEVITOV CHAINS BY OPTIMIZING THE INITIAL STATE</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>Анцуx</surname><given-names>M. A.</given-names></name><name name-style="western" xml:lang="en"><surname>Antsukh</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</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>Леоник</surname><given-names>П. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Leonik</surname><given-names>P. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</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>Пешко</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Peshko</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><email xlink:type="simple">i.peshko@dragon.bas-net.by</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный университет</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Belarusian State University</institution><country>Belarus</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт физики НАН Беларуси</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>07</day><month>02</month><year>2025</year></pub-date><volume>92</volume><issue>1</issue><fpage>109</fpage><lpage>113</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Анцуx M.A., Леоник П.А., Пешко И.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Анцуx M.A., Леоник П.А., Пешко И.А.</copyright-holder><copyright-holder xml:lang="en">Antsukh M.A., Leonik P.A., Peshko I.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://zhps.ejournal.by/jour/article/view/1762">https://zhps.ejournal.by/jour/article/view/1762</self-uri><abstract><p>Исследован процесс смешивания в цепочках Руднера–Левитова, представляющих собой одномерную решетку бозонных мод со спроектированными потерями в каждой второй моде. Показано, что, выбирая начальное возбуждение в системе особым образом, можно добиться существенного уменьшения времени смешивания. В классе одномодовых возбуждений необходимо выбирать собственный вектор эффективного гамильтониана, соответствующий отличному от нуля собственному значению эффективного гамильтониана с наименьшей абсолютной величиной мнимой части. Начальное состояние, локализованное в двух и более модах, необходимо выбирать ортогональным этому собственному вектору. </p></abstract><trans-abstract xml:lang="en"><p>The mixing process in Rudner–Levitov chains, which are a one-dimensional lattice of bosonic modes with designed losses in every second mode, has been studied. It is shown that by choosing the initial excitation in the system in a special way, it is possible to achieve a significant reduction in the mixing time. For an initial state localized in one mode, it is necessary to choose the eigenvector of the effective Hamiltonian, that corresponds to a non-zero eigenvalue of the effective Hamiltonian with the smallest absolute value of the imaginary part. The initial state, localized in two or more modes, must be chosen so that it is orthogonal to this eigenvector. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>квантовые блуждания</kwd><kwd>PT-симметрия</kwd><kwd>неэрмитова фотоника</kwd><kwd>время смешивания</kwd></kwd-group><kwd-group xml:lang="en"><kwd>quantum walk</kwd><kwd>PT-symmetry</kwd><kwd>non-Hermitian photonics</kwd><kwd>mixing time</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Белорусского республиканского фонда фундаментальных исследований (Ф24КИ-058).</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">Wei-Ping Huang. J. Opt. Soc. Am. A, 11, N 3 (1994) 963—983</mixed-citation><mixed-citation xml:lang="en">Wei-Ping Huang. J. Opt. Soc. Am. 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