2 seminars coming up

[CM ICTP - Trieste]

SEMINAR on  Disorder and strong electron correlations



Thursday, 13 November      -  11:00 a.m.



Seminar Room,  Leonardo Building - first floor



D. GANGARDT(University of Birmingham)



"Dissipative dynamics in almost integrable system or life-time of  
dark solitons"



Abstract

The exact quantum excitations of weakly interacting one dimensional  
Bose gas can be observed by their semi-classical counterpart, a dark  
soliton.  Dark solitons are protected from decay by integrability and  
have infinite lifetime.   In this talk I shall discuss possible  
source of non-integrability in realistic systems and show how  
solitons acquire a finite life-time.


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JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR



Tuesday, 18 November    -    12:30 hrs.





Seminar Room, ICTP Leonardo Building-1st floor



R. MONASSON  ( Ecole Normale Supérieure - Paris )



" Inference of effective interactions between retinal neurons "



Abstract



Multi-electrodes techniques allow to register the simultaneous  
activity of tens of ganglion cells in the vertebrate retina for  
several hours.  Recently a low-dimensional representation of this  
activity was proposed, based on the notion of effective interactions.  
I will present how these couplings can be efficiently inferred in two  
models (Ising and Integrate-and-Fire). The dependence of the  
interactions on the visual stimulus, and their spatial structure will  
be discussed.