<?xml version="1.0" encoding="ISO-8859-1"?><article 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">
<front>
<journal-meta>
<journal-id>0188-6266</journal-id>
<journal-title><![CDATA[Acta universitaria]]></journal-title>
<abbrev-journal-title><![CDATA[Acta univ]]></abbrev-journal-title>
<issn>0188-6266</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Guanajuato, Dirección de Investigación y Posgrado]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-62662019000100232</article-id>
<article-id pub-id-type="doi">10.15174/au.2019.2409</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Operador potencia como testigo de la decoherencia en la ejecución de la compuerta de Toffoli en una computadora cuántica de diamante]]></article-title>
<article-title xml:lang="en"><![CDATA[Power operator as witness of the decoherence in the execution of the Toffoli gate in a diamond quantum computer]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Soberanes]]></surname>
<given-names><![CDATA[Fabián]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ávila]]></surname>
<given-names><![CDATA[Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Tecnológico de Estudios Superiores de Chalco  ]]></institution>
<addr-line><![CDATA[Chalco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma del Estado de México  ]]></institution>
<addr-line><![CDATA[Valle de Chalco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<volume>29</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-62662019000100232&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-62662019000100232&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-62662019000100232&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La computadora cuántica de diamante ha sido empleada exitosamente en diversos protocolos de información cuántica. Es usado un Hamiltoniano(H) típico de 3-qubits que componen una computadora cuántica de diamante, el cual consiste de términos diagonales y pulsos de Rabi que generan el giro de los espines de la compuerta de Toffoli. De tal Hamiltoniano es derivado el operador potencia dH/dt. y calculado su valor promedio como función del tiempo. Al resolver numéricamente la ecuación de Schroedinger, se demuestra que la compuerta de Toffoli no se ejecuta y que el operador potencia es testigo de la decoherencia de la ejecución de la compuerta Toffoli. Al depender el Hamiltoniano del tiempo, hay un intercambio de energía del sistema de tres qubits con el medio. Lo anterior induce la decoherencia del sistema. Se concluye que la tecnología de pulsos de Rabi tiene limitaciones.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The diamond quantum computer has been employed successfully for several quantum information protocols. A Hamiltonian (H), 3-qubits typical diamond quantum computer is used, consisting of diagonal terms and Rabi pulses that generate the spin flit of the Toffoli gate. From such a Hamiltonian, the respective power operator dH/dt is derived and its average behavior as a function of time is calculated. To solve numerically the Schroedinger equation, it is shown both that the Toffoli gate is not executed and that the power operator is witness of the decoherence of the execution of the Toffoli gate. When the Hamiltonian depends on time, there is exchange of energy of the 3-qubit system with the environment. The latter induces decoherence of the system. It is also concluded that the Rabi pulses technology has limitations.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Compuerta de Toffoli]]></kwd>
<kwd lng="es"><![CDATA[qubits]]></kwd>
<kwd lng="es"><![CDATA[ejecución]]></kwd>
<kwd lng="es"><![CDATA[operador potencia]]></kwd>
<kwd lng="en"><![CDATA[Toffoli gate]]></kwd>
<kwd lng="en"><![CDATA[qubits]]></kwd>
<kwd lng="en"><![CDATA[execution]]></kwd>
<kwd lng="en"><![CDATA[power operator]]></kwd>
</kwd-group>
</article-meta>
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