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<DIV><FONT face=Arial size=2>Les recordamos el Coloquio de hoy</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2><FONT face="Times New Roman"
size=3>
COLOQUIOS DEL DEPARTAMENTO DE
FÍSICA<BR>
FCEyN -
UBA<BR><BR>
Charla, café y
masitas<BR> En
el Aula Federman, 1er piso Pabellón
I.<BR>
Ciudad Universitaria</FONT> </DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2><FONT face="Times New Roman"
size=3>
<STRONG>Hoy</STRONG> jueves 23 de agosto a las 14 hs<FONT
face=Arial size=2> </FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial size=2><FONT face="Times New Roman"
size=3></FONT></FONT> </DIV>
<DIV><FONT face=Arial size=2><FONT size=3><SPAN
style="FONT-SIZE: 24pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-bidi-font-weight: bold"><SPAN
class=MquinadeescribirHTML2><SPAN lang=ES-AR
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><FONT face="Times New Roman"><FONT
size=5>Experimentos en transiciones de fase a muy baja
temperatura</FONT></FONT></SPAN></SPAN></SPAN></FONT></FONT></DIV>
<DIV><STRONG><FONT face=Arial size=2><FONT face="Times New Roman" size=5><SPAN
style="FONT-SIZE: 24pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-bidi-font-weight: bold"><SPAN
class=MquinadeescribirHTML2><SPAN lang=ES-AR
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></SPAN></SPAN></FONT></FONT><FONT
face=Arial size=2><FONT size=3><FONT
face="Times New Roman"></FONT></FONT></FONT><FONT face=Arial size=2><FONT
face=Arial size=2><FONT face=Arial size=2><FONT face="Times New Roman"><FONT
size=3></FONT></FONT></FONT></FONT></FONT></STRONG> </DIV>
<DIV align=left><FONT face=Arial size=2><FONT face=Arial size=2><FONT face=Arial
size=2><FONT face="Times New Roman"><FONT
size=3> </FONT><FONT
size=4><STRONG> </STRONG> <STRONG>Rodolfo
Borsi</STRONG></FONT></FONT></FONT></FONT></FONT></DIV>
<DIV align=left><FONT face=Arial size=2><FONT face=Arial size=2><STRONG><FONT
face="Times New Roman"></FONT></STRONG><SPAN
style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><FONT
size=4> <SPAN
style="FONT-SIZE: 16pt; COLOR: black; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'"><SPAN
style="FONT-SIZE: 16pt; COLOR: black; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'"><FONT
face="Times New Roman"><FONT size=4>Instituto</FONT> <FONT size=4>de
Investigaciones</FONT> <FONT size=4>Fisicoquímicas Teóricas y
Aplicadas</FONT> </FONT></SPAN></SPAN></FONT></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 16pt; COLOR: black; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'"><SPAN
style="FONT-SIZE: 16pt; COLOR: black; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'"><FONT
face="Times New Roman"
size=4>
(UNLP-CONICET)</FONT></SPAN></SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"></DIV></SPAN>
<DIV><FONT face="Times New Roman" size=3></FONT><FONT face=Arial size=2></DIV>
<DIV><SPAN lang=EN-GB
style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: Verdana; mso-bidi-font-size: 10.0pt; mso-ansi-language: EN-GB; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA; mso-bidi-font-family: Arial"><FONT
face="Times New Roman"
size=3> </FONT></SPAN><FONT
face=Arial size=2><SPAN lang=ES-AR style="mso-ansi-language: ES-AR"><FONT
face="Times New Roman"
size=3>
</FONT></SPAN></DIV>
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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=ES-AR
style="mso-ansi-language: ES-AR"></SPAN>-----------------------------------------------------------------------------------------------------------------------------------------------</P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><BR> </P></DIV>
<DIV><FONT face="Times New Roman" size=3>RESUMEN:</FONT></DIV>
<DIV><SPAN style="mso-ansi-language: ES"><?xml:namespace prefix = o ns =
"urn:schemas-microsoft-com:office:office" /><O:P><FONT face="Times New Roman"
size=3> </FONT></O:P></SPAN></DIV>
<DIV align=justify><SPAN style="mso-ansi-language: ES"><O:P></O:P></SPAN><SPAN
style="mso-ansi-language: ES"><O:P><SPAN
style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><SPAN
style="FONT-SIZE: 16pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 18pt; mso-bidi-font-size: 12.0pt"><FONT
face="Times New Roman"><SPAN class=MquinadeescribirHTML2><SPAN lang=ES-AR
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><FONT face="Times New Roman"><FONT
face="Century Gothic" color=black><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Century Gothic'"><FONT
face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 16pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><FONT
size=3>Un fuego modesto puede fundir el plomo; en contraste, se precisa cierta
tecnología (Edad del Hierro) para alcanzar 1800 ºC y derretir hierro. No
obstante ello, la naturaleza de esta transición de fase (TDF) de primer orden es
en ambos casos la misma. ¿Podríamos alterar la naturaleza de una TDF si ésta
ocurriera a temperaturas cada vez más bajas? A temperaturas bajas la mecánica
cuántica domina el mundo físico; el movimiento de punto cero reemplaza a las
fluctuaciones térmicas. Un nuevo tipo de criticalidad<SPAN
style="mso-spacerun: yes"> </SPAN>emerge en un entorno de una TDF continua
que ocurre a temperatura cero en lo que se conoce como<SPAN
style="mso-spacerun: yes"> </SPAN>una TDF cuántica. Se ha sugerido que la
criticalidad cuántica podría explicar el comportamiento anómalo de materiales
importantísimos en la física actual. Adicionalmente se han observado<SPAN
style="mso-spacerun: yes"> </SPAN>estados de la materia completamente
nuevos en la cercanía de una TDF cuántica. En esta charla recorreremos
algunas</FONT> de <FONT size=3>estas ideas a través de experimentos en un
material en el que los protagonistas directos son los
electrones.</FONT></SPAN></FONT></SPAN></FONT></FONT></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></O:P></SPAN></DIV>
<DIV align=justify><SPAN style="mso-ansi-language: ES"><O:P><SPAN
style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><SPAN
style="FONT-SIZE: 16pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 18pt; mso-bidi-font-size: 12.0pt"><FONT
face="Times New Roman"><FONT size=3><SPAN class=MquinadeescribirHTML2><SPAN
lang=ES-AR style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><FONT
face="Times New Roman"><FONT size=3><FONT face="Century Gothic" color=black
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Century Gothic'"><FONT
face="Times New Roman"
size=3>-----------------------------------</FONT></SPAN></FONT></FONT></FONT></SPAN></SPAN></FONT></FONT></SPAN></SPAN></SPAN></O:P></SPAN></DIV>
<DIV align=justify><SPAN style="mso-ansi-language: ES"><O:P><SPAN
style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><SPAN
style="FONT-SIZE: 16pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 18pt; mso-bidi-font-size: 12.0pt"><FONT
face="Times New Roman"><FONT size=3><SPAN class=MquinadeescribirHTML2><SPAN
lang=ES-AR style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><FONT
face="Times New Roman"><FONT size=3><FONT face="Century Gothic" color=black
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Century Gothic'"><FONT
face="Times New Roman" size=3>Estan todos
invitados!</DIV></FONT></SPAN></FONT></FONT></FONT></SPAN></SPAN></FONT></FONT></SPAN></SPAN></SPAN></O:P></SPAN></FONT></FONT></FONT></FONT></FONT></BODY></HTML>