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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">dan</journal-id><journal-title-group><journal-title xml:lang="ru">Доклады Национальной академии наук Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Doklady of the National Academy of Sciences of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8323</issn><issn pub-type="epub">2524-2431</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">dan-417</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>ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group></article-categories><title-group><article-title>СКАЛЯРНОЕ ПОЛЕ В ОСЦИЛЛИРУЮЩЕЙ ВСЕЛЕННОЙ ДЕ СИТТЕРА И ОТРАЖЕНИЕ ОТ КОСМОЛОГИЧЕСКОГО БАРЬЕРА</article-title><trans-title-group xml:lang="en"><trans-title>SCALAR FIELD IN THE OSCILLATING DE SITTER UNIVERSE AND REFLECTION FROM A COSMOLOGICAL BARRIER</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>Овсиюк</surname><given-names>Е. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Оvsiyuk</surname><given-names>E. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. физ.-мат. наук, доцент</p></bio><bio xml:lang="en"><p>Ph. D. (Physics and Mathematics), Assistant Professor</p></bio><email xlink:type="simple">e.ovsiyuk@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>Коральков</surname><given-names>А. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Koralkov</surname><given-names>A. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>студент</p></bio><bio xml:lang="en"><p>Student</p></bio><email xlink:type="simple">artemkoralkov@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Мозырский государственный педагогический университет им. И. П. Шамякина</institution></aff><aff xml:lang="en"><institution>Mozyr State Pedagogical University named after I. P. Shamyakin</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>09</day><month>08</month><year>2017</year></pub-date><volume>61</volume><issue>3</issue><fpage>18</fpage><lpage>25</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Овсиюк Е.М., Коральков А.Д., 2017</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="ru">Овсиюк Е.М., Коральков А.Д.</copyright-holder><copyright-holder xml:lang="en">Оvsiyuk E.M., Koralkov A.D.</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://doklady.belnauka.by/jour/article/view/417">https://doklady.belnauka.by/jour/article/view/417</self-uri><abstract><p>Ранее было установлено существование эффекта полного отражения частиц от космологического барьера, генерируемого геометрией пространства Лобачевского. В настоящей работе исследован эффект «космологического зеркала» в условиях нестатической геометрии пространства–временени. Детально рассмотрен случай скалярного поля в случае осциллирующей модели де Ситтера. В условиях нестатичности геометрии эффект отражения от космологического барьера сохраняется. Показано также, что обращение в нуль множителя  cos2 t в метрике пространства–времени не приводит к сингулярному поведению решений уравнения для скалярного поля, поскольку имеются простые асимптотики решений по временной переменной t в виде чистых фазовых множителей, и при рассмотрении квадрата модуля волновых функций эти фазовые множители при cos t → 0 обращаются в 1.</p></abstract><trans-abstract xml:lang="en"><p>Recently it has been shown that the Lobachevsky geometry simulates an ideal mirror distributed in the space. Since the Lobachevsky model enters some cosmological models of the Universe, using theses models we need to take into account the presence of the «cosmological mirror». The earlier analysis assumed a static character of the space-time geometry. In this article, the generalization of the cosmological reflection effect to the oscillating de Sitter Universe is given for the scalar field. It is shown that the vanishing factor  cos2 t in the metric of space-time does not lead to a singular behavior of solutions of the wave equation for the scalar field; instead, the solutions have a simple phase factor behavior in the time variable t, so the squared modulus of the wave function at cos  t → 0 turns to be 1.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>уравнение Клейна–Фока–Гордона</kwd><kwd>спин 0</kwd><kwd>осциллирующая модель де Ситтера</kwd><kwd>разделение переменных</kwd><kwd>точные решения</kwd><kwd>отражение частиц</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Klein–Fock–Gordon equation</kwd><kwd>spin 0</kwd><kwd>the oscillating de Sitter universe</kwd><kwd>separation of the variables</kwd><kwd>exact solutions</kwd><kwd>reflection of the particles</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">Maxwell equations in Riemannian space-time, geometry effect on material equations in media / V. 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