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Absorbingstate Phase Transitions: Challenges for Mathematicians
Prof. Leonardo T. Rolla(NYU Shanghai and University of Buenos Aires)
13:4514:45, 25 September 2014 中山北路校区，地理楼264室 

ABSTRACT OF THE TALK
Modern statistical mechanics offers a large class of drivendissipative systems that naturally evolve to a critical state. Here we consider two infinitevolume systems: the activated random walks and the stochastic sandpile.
The main goal in this field is to describe the critical behavior, the scaling relations and critical exponents of these systems, and whether their critical density is the same as the longtime limit attained in their drivendissipative finitevolume version. These questions are however far beyond the reach of current techniques. Due to strong nonlocality of correlations and dynamic longrange effects, classical analytic and probabilistic tools fail in most cases of interest, making the rigorous analysis of such systems a major mathematical challenge.
In this talk we will report on the progress obtained in recent years. We will show some novel ideas and techniques which allowed some steps forward in understanding the phase transition in these systems, and discuss some of the open problems.
BIOGRAPHY
Leonardo T. Rolla is a Visiting Assistant Professor at NYU Shanghai. He is also a tenured Researcher of the Argentinian National Research Council. He obtained the PhD in 2008 from IMPA, Rio de Janeiro, Brazil.
Professor Rolla’s research interests are Percolation, Particle Systems and Spatial Processes. His work has appeared in journals such as InventionesMathematicae, Communications on Pure and Applied Mathematics, The Annals of Probability, SIAM Multiscale Modeling and Simulation, Stochastic Processes and their Applications, and Journal of Statistical Physics.
Professor Rolla has obtained fellowships from the Foundation Sciences Mathématiques de Paris in 2008 and the Excellence Postdoctorate from IMPA in 2010.




