<?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>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2008000600008</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[SU(1,1) coherent states as Bessel-Gauss states]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hacyan]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Física ]]></institution>
<addr-line><![CDATA[México D.F.]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2008</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2008</year>
</pub-date>
<volume>54</volume>
<numero>6</numero>
<fpage>451</fpage>
<lpage>453</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2008000600008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2008000600008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2008000600008&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[The SU(1,1) coherent states of Barut and Girardello can be interpreted as Bessel-Gauss states that are time-dependent solutions of the Schrödinger equation. In this article, some basic properties of these states and their related operators are analyzed.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Los estados coherentes SU(1,1) de Barut y Girardello se pueden interpretar como estados de Bessel-Gauss que son soluciones dependientes del tiempo de la ecuación de Schrödinger. En este artículo, se analizan algunas propiedades básicas de estos estados y sus operadores asociados.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Coherent states]]></kwd>
<kwd lng="en"><![CDATA[SU(1; 1) Barut-Girardello states]]></kwd>
<kwd lng="es"><![CDATA[Estados coherentes]]></kwd>
<kwd lng="es"><![CDATA[estados SU(1,1) de Barut-Girardello]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Investigaci&oacute;n</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>SU(1,1) coherent states as Bessel&#150;Gauss states</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>S. Hacyan</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i>Instituto de F&iacute;sica, Universidad Nacional Aut&oacute;noma de M&eacute;xico, Apartado Postal 20&#150;364, M&eacute;xico D.F. 01000, M&eacute;xico, </i>e&#150;mail: <a href="mailto:hacyan@fisica.unam.mx">hacyan@fisica.unam.mx</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Recibido el 18 de agosto de 2008    <br> Aceptado el 11 de noviembre de 2008</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>     <p align="justify"><font face="verdana" size="2">The SU(1,1) coherent states of Barut and Girardello can be interpreted as Bessel&#150;Gauss states that are time&#150;dependent solutions of the Schr&ouml;dinger equation. In this article, some basic properties of these states and their related operators are analyzed.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Keywords: </b>Coherent states; SU(1; 1) Barut&#150;Girardello states.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     <p align="justify"><font face="verdana" size="2">Los estados coherentes SU(1,1) de Barut y Girardello se pueden interpretar como estados de Bessel&#150;Gauss que son soluciones dependientes del tiempo de la ecuaci&oacute;n de Schr&ouml;dinger. En este art&iacute;culo, se analizan algunas propiedades b&aacute;sicas de estos estados y sus operadores asociados.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Descriptores: </b>Estados coherentes; estados SU(1,1) de Barut&#150;Girardello. </font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">PACS: 42.50.Dv</font></p>     ]]></body>
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