QLS Seminar - Today, 3 July at 11h00 - Flocking in One-dimensional Systems of Interacting Brownian Particles: Synchronous vs Asynchronous Updates

[Quantitative Life Sciences]

Dear All,

Today, Friday 3 July at 11h00 Victor Dossetti Romero (Instituto de 
Ciencias Benemerita Universidad Autonoma de Puebla, Mexico) will give a 
seminar titled:

*"Flocking in One-dimensional Systems of Interacting Brownian Particles: 
Synchronous vs Asynchronous Updates"*

We study a one-dimensional system of Brownian particles that interact 
among themselves through local velocity-lignment forces that are 
discrete in time and do not affect the particle speed. The local 
velocity-alignment acts periodically over the system with time period 
t_a and probability P= t_a/t_0, with t_0 being a control parameter. 
Depending on the relation between t_a and t_0, the velocity-alignment 
can affect all of the particles synchronously in time or just a few 
asynchronously. In any case, as the velocity-alignment events become 
more frequent, the system is driven from stationary states close to 
thermal equilibrium, to far-from-equilibrium ones where the system 
exhibits spontaneous symmetry breaking and self-organization. Therefore, 
our results show that self-propulsion is not a necessary ingredient to 
produce the flocking transition even in one-dimensional systems. Above 
the critical point, for the synchronous case, the velocity distribution 
of the particles exhibits periodic oscillations in time with period t_a, 
and their density distribution shows a breathing-like behavior. The 
effects of these phenomena produce a regular spiking activity in the 
order parameter as the system approaches to the thermodynamic limit.



The seminar will take place in the *Common Area, 2nd floor, old SISSA 
building (Via Beirut, 2).*

You are all most welcome to attend!

Best regards,

Erica

Erica Sarnataro
Group Secretary
Quantitative Life Sciences
The Abdus Salam International Centre for Theoretical Physics (ICTP)
Trieste,  Italy
Tel. +39-040-22404623 (NEW PHONE NUMBER)
www.ictp.it/research/qls.aspx
e-mail:qls at ictp.it