Mark Kac seminar - VVSOR - VVSOR

Vereniging voor Statistiek en Operations Research
05 October 2018

Mark Kac seminar

You are all cordially invited to the first Mark Kac seminar of this academic year 2018/19!

 

Friday October 5

Utrecht, Janskerkhof 15a (Utrecht), room 101

 

11:15-13:00

Speaker: Martin Slowik  (TU Berlin)

Title  : From stochastic interface models to random walks in time-dependent random environments — and back?

 

 

14:30-16:15

Speaker: Alessandra Cipriani (TU Delft)

Title  : Scaling random interfaces

 

 

Abstract: Martin Slowik

 

There is a somewhat unexpected connection between random walks in time-dependent random environments and gradient Gibbs measures describing stochastic interfaces in systems arising from statistical mechanics, e.g., the Ginzburg-Landau model, and its dynamics. After reviewing how the space-time covariances of the height of the interface can be expressed in terms of random walks among dynamic random conductances, I will discuss recent progress on the understanding of the behaviour of such random walks. A particular emphasis will be on the results and the methods that has been used to prove invariance principles, local limit theorems and heat estimates for almost every realisation of the environment.

 

Abstract: Alessandra Cipriani

 

Random interfaces arise naturally as separating surfaces between two different thermodynamic phases or states of matter, for example oil and water. In this talk we will introduce a few Gaussian models for random interfaces: they are called the discrete Gaussian free field (DGFF), the membrane model (MM), and the   -model, which represents a mixture between DGFF and MM. We will present their similarities and differences, and in addition we will discuss their connections to the theory of partial differential equations and numerical analysis. Later we will focus on their scaling limits, and we will show in particular that in the mixed case the GFF component of the model dominates in the limit. Based on joint works with Biltu Dan and Rajat Subhra Hazra (ISI Kolkata).

 

The Mark Kac seminar is an activity of the STAR stochastics cluster. See

also our website http://www.win.tue.nl/markkac