[Todos] Coloquios (varios) del Departamento de Física

[pdmitruk en df.uba.ar]

Debido a la gran cantidad de visitantes en el Departamento de Física,
esta semana tenemos cuatro coloquios.

Los temas son variados y esperamos puedan concurrir a mas de
una de las presentaciones, ademas de la oficial de los jueves,
todas en el Aula Federman, 1er piso, Pab. I.


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                      COLOQUIOS DEL DEPARTAMENTO DE FÍSICA FCEyN - UBA

                               http://coloquios.df.uba.ar/

                                Charla, café y galletitas
                      En el Aula Federman, 1er piso, Pabellón I,
                               Ciudad Universitaria

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                              Martes 2 de noviembre, 14hs,


                            Quantum turbulence simulations

                                    Marc Brachet

                           Laboratoire de Physique Statistique
                             Ecole Normal Superieure, Paris



The talk is about simulations of finite-temperature superfluids, using  
the Truncated Gross-Pitaevskii Equation (TGPE). First, we will recall  
the thermalization that is known to take place in the truncated Euler  
equation for incompressible fluids. The statistical equilibria of the  
(conservative) TGPE dynamics will then be characterized using an  
algorithm based on a stochastically forced Ginzburg-Landau equation  
(SGLE) that directly generates grand canonical distributions. A  
standard finite-temperature second-order $\lambda$-transition will be  
exhibited. A new turbulent mechanism of TGPE thermalization at small  
scales through a direct cascade of energy will be demonstrated.  
Dynamical counter-flow effects on vortex evolution will be  
investigated using SGLE-preparated initial data and a dilatation of  
vortex rings will be obtained for counter flows larger than their  
longitudinal velocity.

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                          Miércoles 3 de noviembre, 14 hs

                                Marina Tortarolo

                            Institute des Nano Sciences de Paris
                             University Pierre et Marie Curie



  Durante la última década han cobrado gran interés las películas  
delgadas de MnAs crecidas sobre diferentes sustratos semiconductores,  
dado su potencial interés tecnológico en electrónica de espín. En esta  
charla se presentan diferentes aspectos de las heteroestructuras  
híbridas de MnAs/GaAs, como ser: la estructura de dominios magnéticos,  
su dinámica y los efectos que aparecen al reducir las dimensiones  
laterales de las películas delgadas.

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                          Jueves 4 de noviembre, 14 hs

                                 Louis Lyons

                               Oxford University



These two very different approaches to analysing data are described  
and contrasted, using examples both from every-day life and from the  
world of Physics. Their interpretations of 'probability' are  
contrasted. When used for determining parameters of a theory, cases  
where the resulting answers differ significantly are described.  
Finally, a summary is given of the differences between the Bayesian  
and Frequentist approaches.

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                           Jueves 4 de noviembre, 16 hs

                                Frank Avignone

                          University of South Carolina



A brief history of important events in non accelerator neutrino  
physics will be given with emphasis on neutrino astrophysics. The  
status of our understanding of neutrino properties will be discussed,  
and one present effort to use a search for zero-neutrino double-beta  
decay to answer the open questions will be described. The example  
given will be the CUORE Experiment in the Laboratori Nazionali del  
Gran Sasso, in Assergi, Italy.

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