<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC
  "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.4 20241031//EN"
  "https://jats.nlm.nih.gov/publishing/1.4/JATS-journalpublishing1-4.dtd">

<article
    xmlns:xlink="http://www.w3.org/1999/xlink"
    xmlns:mml="http://www.w3.org/1998/Math/MathML"
    article-type="research-article"
    dtd-version="1.4"
    xml:lang="ru">

  <front>
    <journal-meta>
      <journal-id journal-id-type="publisher-id">journal</journal-id>

      <journal-title-group>
        <journal-title>Вестник Объединенного института высоких температур</journal-title>
        <abbrev-journal-title abbrev-type="publisher">Вестник ОИВТ РАН</abbrev-journal-title>
      </journal-title-group>

      <issn pub-type="epub">2658-669X</issn>

      <publisher>
        <publisher-name>ОИВТ РАН</publisher-name>
      </publisher>
    </journal-meta>

    <article-meta>
      <article-id pub-id-type="publisher-id">108</article-id>
      <article-id pub-id-type="doi"></article-id>

      <title-group>
        <article-title>Систематический вывод функционала и псевдопотенциала Кельбга</article-title>
        <trans-title-group xml:lang="en">
          <trans-title>
            Systematic derivation of the Kelbg functional and pseudopotential
          </trans-title>
        </trans-title-group>
      </title-group>

      <contrib-group>
        <contrib contrib-type="author">
          <name-alternatives>
            <name xml:lang="ru">
              <surname></surname>
              <given-names> </given-names>
            </name>
            <name xml:lang="en">
              <surname>Demyanov</surname>
              <given-names>G.S.</given-names>
            </name>
          </name-alternatives>
          <xref ref-type="aff" rid="id1">ОИВТ РАН</xref>
        </contrib>

        <contrib contrib-type="author">
          <name-alternatives>
            <name xml:lang="ru">
              <surname></surname>
              <given-names> </given-names>
            </name>
            <name xml:lang="en">
              <surname>Levashov</surname>
              <given-names>P.R.</given-names>
            </name>
          </name-alternatives>
          <xref ref-type="aff" rid="id2">ОИВТ РАН</xref>
        </contrib>

      </contrib-group>

      <aff-alternatives id="id1">
        <aff xml:lang="ru">
          <label>ОИВТ РАН</label>
          <institution>Объединенный институт высоких температур РАН (Москва, Россия)</institution>
          <addr-line>Москва, Россия</addr-line>
        </aff>
        <aff xml:lang="en">
          <label>JIHT RAS</label>
          <institution>Joint Institute for High Temperatures of the Russian Academy of Sciences (Moscow, Russia)</institution>
          <addr-line>Moscow, Russia</addr-line>
        </aff>
      </aff-alternatives>

      <aff-alternatives id="id2">
        <aff xml:lang="ru">
          <label>ОИВТ РАН</label>
          <institution>Объединенный институт высоких температур РАН (Москва, Россия)</institution>
          <addr-line>Москва, Россия</addr-line>
        </aff>
        <aff xml:lang="en">
          <label>JIHT RAS</label>
          <institution>Joint Institute for High Temperatures of the Russian Academy of Sciences (Moscow, Russia)</institution>
          <addr-line>Moscow, Russia</addr-line>
        </aff>
      </aff-alternatives>

      <pub-date publication-format="electronic" date-type="pub" pub-type="epub" iso-8601-date="2023-01-20">
        <day>20</day>
        <month>01</month>
        <year>2023</year>
      </pub-date>

      <volume>7</volume>
      <issue>6</issue>
      <fpage>30</fpage>
      <lpage>39</lpage>

      <abstract xml:lang="ru">
        <p>В данной методической работе в высокотемпературном пределе систематически выведено выражение для матрицы плотности для системы частиц, взаимодействующих посредством кулоновского потенциала. Выкладки соответствуют оригинальной работе Кельбга  cite{Kelbg:Annalen:1963}, в которой решается уравнение Блоха в первом порядке теории возмущений.
Особое внимание было уделено объяснению всех преобразований при выводе, чтобы упростить понимание этой нетривиальной теории. Решение Кельбга широко используется в моделировании методом Монте-Карло с интегралами по траекториям.</p>
      </abstract>

      <abstract xml:lang="en" abstract-type="summary">
        <p>In this paper the density matrix for a system of particles interacting via the Coulomb potential is systematically derived in the high–temperature limit. The derivation corresponds to the original work by Kelbg [ href{https://doi.org/10.1002/andp.19634670308}{Kelbg G 1963 Annalen der Physik  textbf{467} 219-224}], which solves the Bl &quot;och equation in the first order of perturbation theory. Special attention is paid to explain all the transformations in the derivation in order to simplify the understanding of this non-trivial theory. The solution of Kelbg is widely used in path integral simulations of Coulomb systems.</p>
      </abstract>

      <kwd-group kwd-group-type="author-keywords" xml:lang="ru">
        <kwd>высокотемпературная матрица плотности</kwd>
        <kwd>потенциал Кельбга</kwd>
        <kwd>дальнодействующее взаимодействие</kwd>
        <kwd>псевдопотенциал</kwd>
        <kwd>Монте-Карло с интегралами по траекториям</kwd>
      </kwd-group>

      <kwd-group kwd-group-type="author-keywords" xml:lang="en">
        <kwd>high-temperature density matrix</kwd>
        <kwd>Kelbg potential</kwd>
        <kwd>long-range interaction</kwd>
        <kwd>pseudopotential</kwd>
        <kwd>Path Integral Monte Carlo</kwd>
      </kwd-group>

    </article-meta>
  </front>
  <back>
    <ref-list>
      <ref id="ref1">
        <mixed-citation publication-type="other" xml:lang="ru">
          Kelbg G. // Annalen der Physik. — 1963. — Vol. 467. — No. 3-4. — P. 219-224         
        </mixed-citation>
        <mixed-citation publication-type="other" xml:lang="en">
          Kelbg G. // Annalen der Physik. — 1963. — Vol. 467. — No. 3-4. — P. 219-224         
        </mixed-citation>
      </ref>
      <ref id="ref2">
        <mixed-citation publication-type="other" xml:lang="ru">
          Filinov A. V., Golubnychiy V. O., Bonitz M., Ebeling W., Dufty J. W. // Phys. Rev. E. — 2004. — Vol. 70. — No. 4. — P. 046411         
        </mixed-citation>
        <mixed-citation publication-type="other" xml:lang="en">
          Filinov A. V., Golubnychiy V. O., Bonitz M., Ebeling W., Dufty J. W. // Phys. Rev. E. — 2004. — Vol. 70. — No. 4. — P. 046411         
        </mixed-citation>
      </ref>
      <ref id="ref3">
        <mixed-citation publication-type="other" xml:lang="ru">
          Filinov V. S., Bonitz M., Ebeling W., Fortov V. E. // Plasma Physics and Controlled Fusion. — 2001. — Vol. 43. — No. 6. — P. 743–759         
        </mixed-citation>
        <mixed-citation publication-type="other" xml:lang="en">
          Filinov V. S., Bonitz M., Ebeling W., Fortov V. E. // Plasma Physics and Controlled Fusion. — 2001. — Vol. 43. — No. 6. — P. 743–759         
        </mixed-citation>
      </ref>
      <ref id="ref4">
        <mixed-citation publication-type="other" xml:lang="ru">
          Fraser L. M., Foulkes W. M. C., Rajagopal G., Needs R. J., Kenny S. D., Williamson A. J. // Phys. Rev. B. — 1996. — Vol. 53. — No. 4. — P. 1814–1832         
        </mixed-citation>
        <mixed-citation publication-type="other" xml:lang="en">
          Fraser L. M., Foulkes W. M. C., Rajagopal G., Needs R. J., Kenny S. D., Williamson A. J. // Phys. Rev. B. — 1996. — Vol. 53. — No. 4. — P. 1814–1832         
        </mixed-citation>
      </ref>
      <ref id="ref5">
        <mixed-citation publication-type="other" xml:lang="ru">
          Dornheim T., Groth S., Bonitz M. // Physics Reports. — 2018. — Vol. 744. — P. 1-86         
        </mixed-citation>
        <mixed-citation publication-type="other" xml:lang="en">
          Dornheim T., Groth S., Bonitz M. // Physics Reports. — 2018. — Vol. 744. — P. 1-86         
        </mixed-citation>
      </ref>
      <ref id="ref6">
        <mixed-citation publication-type="other" xml:lang="ru">
          Wolfram Research I. Mathematica, Version 12.3.1         
        </mixed-citation>
        <mixed-citation publication-type="other" xml:lang="en">
          Wolfram Research I. Mathematica, Version 12.3.1         
        </mixed-citation>
      </ref>
      <ref id="ref7">
        <mixed-citation publication-type="other" xml:lang="ru">
          Feynman R. P. Statistical mechanics: a set of lectures by R. P. Feynman., 1972         
        </mixed-citation>
        <mixed-citation publication-type="other" xml:lang="en">
          Feynman R. P. Statistical mechanics: a set of lectures by R. P. Feynman., 1972         
        </mixed-citation>
      </ref>
      <ref id="ref8">
        <mixed-citation publication-type="other" xml:lang="ru">
          Kleinert H. Path integrals in quantum mechanics, statistics, polymer physics, and financial markets. — : World scientific, 2009         
        </mixed-citation>
        <mixed-citation publication-type="other" xml:lang="en">
          Kleinert H. Path integrals in quantum mechanics, statistics, polymer physics, and financial markets. — : World scientific, 2009         
        </mixed-citation>
      </ref>
    </ref-list>
  </back>

</article>