[Todos] Coloquio de Berry-Cambio de Aula

[lozano en df.uba.ar]

                      ATENCION CAMBIO DE AULA  Y PABELLON
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Debido a los porbelmas de cortes de electricidad el coloquio tendra lugar 
en el AULA 10 del PAB II
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COLOQUIOS DEL DEPARTAMENTO DE FÍSICA
                                            FCEyN - UBA

                                    Charla, café y masitas
                             En el Aula 10, 1er piso Pabellón II.
                                  Ciudad Universitaria


                    El próximo  jueves 2 de noviembre  a las 14 hs

                               Conical diffraction:
                    Imaging Hamilton´s diabolical point  
                          
                                           Michael Berry
                            Physics Department, Bristol University
                                                  
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RESUMEN:
  
The transformation of a narrow beam into a hollow cone when incident  along the
optic axis

of a biaxial crystal, predicted by Hamilton in  1832, created a sensation when
observed by

Lloyd soon afterwards. It was the prototype of the conical intersections now
popular in quantum

chemistry. But the fine structure of the light cone contains many subtle
features, slowly revealed

by experiment, whose definitive explanation, involving new mathematical
asymptotics, has been

achieved only recently, along with definitive experimental test of the theory.
Radically different

phenomena, being intensively studied now, arise when chirality and absorption
are incorporated

in addition to biaxiality.



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Los esperamos! 



-- 
Gustavo Lozano
Depto de Fisica, FCEyN,UBA
PAB I Ciudad Universitaria
1428 Buenos Aires
Argentina
Phone:=0054-11-4576 3390 (ext 816)
Phone:=0054-11-4576 3353 (Physics Dept)
Fax:=0054-11-4576 3357