Seminario ICF-UNAM, Jueves 14 de Enero 2010

["Dr. Remigio Cabrera Trujillo" <trujillo@xxxxxxxxxxx>]

Estimados Todos,
(mensaje sin acentos)

La intencion del Seminario Interno es promover el trabajo de nuestros colegas, 
asi como fomentar colaboraciones interdiciplinarias en nuestra institucion. El 
Seminario Interno del Instituto de Ciencias Fisicas de la UNAM, campus Morelos 
sera impartido por el

Dr. Thomas Gilbert,
Service de Physique des Systmes Complexes et Mcanique Statistique
Universit Libre de Bruxelles
Profesor visitante ICF-UNAM

con el titulo:
Equilibrium and non-equilibrium Galton boards

Resumen:
Galton boards are models of deterministic diffusion in a uniform external 
field, akin to driven periodic Lorentz gases, which are here considered in 
the absence of dissipation mechanism. By considering a cylindrical 
geometry with axis along the direction of the external field, the 
two-dimensional board becomes a model for one-dimensional mass transport 
along the direction of the external field. Equilibrium and non-equilibrium 
stationary states arise, depending on the specific choice of boundary 
conditions at the ends of the cylinder. While the former is associated to 
a closed board and has a uniform invariant measure, the latter is 
associated to an open board with the two ends in contact with particle 
reservoirs and has a fractal invariant measure. Numerical results are 
presented in support of this claim. A correspondence is established 
between the local phase-space statistics and their macroscopic 
counter-part. Analytical results are obtained for the statistics of 
multi-baker maps associated to such a non-uniform diffusion process and 
the fractality of the invariant state related to the positivity of the 
entropy production rate.

Este Jueves 14 de Enero, a las 17:30 horas Auditorio del ICF.

Esperando contar con su asistencia, me despido enviandoles un cordial saludo.

==========
Dr. Remigio Cabrera-Trujillo    |  Investigador
Instituto de Ciencias Fisicas,  |  Tel: (+52) 777 329 1757 (direct)
UNAM, Cuernavaca AP 48-3        |       (+52) 777 313 6915 (secretary)
Morelos, Mexico 62210           |  http://www.fis.unam.mx/~trujillo