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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">metrol</journal-id><journal-title-group><journal-title xml:lang="ru">Метрология</journal-title><trans-title-group xml:lang="en"><trans-title>Metrologiya</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0132-4713</issn><issn pub-type="epub">2712-9071</issn><publisher><publisher-name>ВНИИМС</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">metrol-332</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>ФУНДАМЕНТАЛЬНЫЕ ПРОБЛЕМЫ МЕТРОЛОГИИ</subject></subj-group></article-categories><title-group><article-title>Зацепленные состояния в контексте повышения помехоустойчивости предельных измерений</article-title><trans-title-group xml:lang="en"><trans-title></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>Жерихина</surname><given-names>Л. Н.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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>Измайлов</surname><given-names>Г. Н.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Цховребов</surname><given-names>А. М.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>Физический институт РАН им. П. Л. Лебедева</institution><country>Russian Federation</country></aff><aff xml:lang="ru" id="aff-2"><institution>Московский авиационный институт (национальный исследовательский университет)</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2014</year></pub-date><pub-date pub-type="epub"><day>07</day><month>02</month><year>2023</year></pub-date><volume>0</volume><issue>8</issue><fpage>3</fpage><lpage>17</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ВНИИМС, 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">ВНИИМС</copyright-holder><copyright-holder xml:lang="en">ВНИИМС</copyright-holder><license xlink:href="https://metrol.elpub.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://metrol.elpub.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://metrol.elpub.ru/jour/article/view/332">https://metrol.elpub.ru/jour/article/view/332</self-uri><abstract><p>Показано, что в некоторых случаях при измерениях на уровне, когда начинают заметно сказываться квантовые ограничения точности, для глубокого активного подавления фоновых помех можно использовать квантовую зацепленность состояний исследуемой системы. Рассмотрены примеры, в которых зацепленность обеспечивает «дополнительную степень свободы», позволяющую отбирать необходимые события, отбраковывая помехи.</p></abstract><trans-abstract xml:lang="en"><p>It is shown that when the quantum limitations are starting to affect significantly the accuracy of measurement, the quantum entanglement of the studied system states can be used for the deep active suppression of background noise. The entanglement ensures an "extra degree of freedom" allowing to select the required events and to cull the noise. The examples of such situation are considered.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>квантово-механическая связь</kwd><kwd>ЭПР-парадокс</kwd><kwd>неравенства Белла</kwd><kwd>помехоустойчивость</kwd><kwd>предельные измерения</kwd><kwd>сверхпроводящая линия</kwd><kwd>джозефсоновский контакт</kwd><kwd>аксионы</kwd><kwd>квантовая зацепленность</kwd><kwd>quantum-mechanical coupling</kwd><kwd>EPR paradox</kwd><kwd>Bell's inequalities</kwd><kwd>noise stability</kwd><kwd>ultimate measurements</kwd><kwd>superconductive line</kwd><kwd>Josephson junction</kwd><kwd>axions</kwd><kwd>quantum entanglement</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">Ma X.-S. e. a. Quantum teleportation over 143 kilometers using active feed-forward // Nature. 2012. V.</mixed-citation><mixed-citation xml:lang="en">Ma X.-S. e. a. 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