CAM Colloquium, 2016-09-30 - Maria Cameron: Modeling the dynamics of interacting particles by means of stochastic networks
From E. Cornelius on June 26th, 2017
Abstract: Material science have been rapidly developing in recent years. A variety of particles interacting according to different kinds of pair potentials has been produced in experimental works. Looking into the future, one can imagine controlled self-assembly of particles into clusters of desired structures leading to the creation of new types of materials. Analytical studies of the self-assembly involve coping with difficulties associated with the huge numbers configurations, high dimensionality, complex geometry, and unacceptably large CPU times.
A feasible approach to the study of self-assembly consists of mapping the collections of clusters onto stochastic networks (continuous-time Markov chains) and analyzing their dynamics. Vertices of the networks represent local minima of the potential energy of the clusters, while arcs connect only those pairs of vertices that correspond to local minima between which direct transitions are physically possible. Transition rates along the arcs are the transition rates
between the corresponding pairs of local minima. Such networks are mathematically tractable and, at the same time, preserve important features of the underlying dynamics. Nevertheless, their huge size and complexity render their analysis challenging and invoke the development of new mathematical techniques. I will discuss some approaches to construction and analysis of such networks.
Biography: Born in Moscow, Russia. M.S. in Applied Mathematics from The Moscow Institute of Physics and Technology, 1998. Emigrated to the USA in 2000. Ph.D. in Applied Mathematics from University of California, Berkeley, 2007.
2007-2010: Courant Instructor, New York University. Since 2010: Assistant Professor of Mathematics in the University of Maryland, College Park, MD. Current research interests: Computational stochastic processes, Markov chains,
Rare events in complex physical systems.