Stochastics Seminar
Click here for the Stochastics Group website
Spring 2024 Friday 3:00-4:00 PM (unless otherwise announced)
Room for in-person: LCB 215
Zoom information: E-mail the organizers
(in person talks are not broadcast on Zoom)
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Date | Speaker | Title (click for abstract, if available) |
---|---|---|
Friday, October 4th |
Jeremy Clark
University of Mississippi |
The critical two-dimensional stochastic heat flow (2d SHF) is a two-parameter process of random Borel measures on R^4 derived in a breakthrough article by Caravenna, Sun, and Zygouras as a universal distributional limit of point-to-point partition functions for (1+2)-dimensional models of a directed polymer in a random environment within a critical weak-coupling scaling regime. I will discuss continuum polymer measures associated with the 2d SHF, with an emphasis on the structure of their second moments. Our approach is inspired by a one-dimensional continuum directed polymer model formulated by Alberts, Khanin, and Quastel. |
Friday, October 25th |
Xincheng Zhang
University of Toronto |
In this talk, I will present the transition probability of TASEP in half-space starting with general deterministic initial condition. I will show how properties of half-space TASEP are manifested on the formula. Taking the 1:2:3 KPZ scaling, I will present the transition probability of the half-space KPZ fixed point. |
Friday, November 1st (two talks) |
Ran Tao
University of Maryland |
We study the half-space KPZ equation with a Neumann boundary condition, starting from stationary Brownian initial data. We derive a variance identity that links the fluctuations of the height function to the transversal fluctuations of a half-space polymer model. We then establish optimal fluctuation exponents for the height function in both the subcritical and critical regimes, along with corresponding estimates for the polymer endpoint. Based on a joint work with Yu Gu. |
Friday, November 1st (two talks) |
Chris Janjigian
Purdue University |
This talk will discuss some recent progress on understanding the structure of semi-infinite geodesics and their associated Busemann functions in the inhomogeneous exactly solvable exponential last-passage percolation model. In contrast to the homogeneous model, this generalization admits linear segments of the limit shape and an associated richer structure of semi-infinite geodesic behaviors. Depending on certain choices of the inhomogeneity parameters, we show that the model exhibits new behaviors of semi-infinite geodesics, which include wandering semi-infinite geodesics with no asymptotic direction, isolated asymptotic directions of semi-infinite geodesics, and non-trivial intervals of directions with no semi-infinite geodesics. Based on joint work with Elnur Emrah (Bristol) and Timo Seppäläinen (Madison) |
Friday, November 15th |
Tom Alberts
University of Utah |
We implement a version of conformal field theory (CFT) that gives a connection to SLE in a multiply connected domain. Our approach is based on the Gaussian free field and applies to CFTs with central charge c=1. In this framework we introduce the generalized Eguchi-Ooguri equations and use them to derive the explicit form of Ward's equations, which describe the insertion of a stress tensor in terms of Lie derivatives and differential operators depending on the Teichmuller modular parameters. Furthermore, by implementing the BPZ equations, we provide a conformal field theoretic realization of an SLE in a multiply connected domain, which in particular suggests its drift function, and construct a class of martingale observables for this SLE process. |
Friday, TBA |
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This web page is maintained by Tom Alberts.
Past Seminars:
- Fall 2023 || Spring 2024
- Fall 2022 || Spring 2023
- Fall 2021 || Spring 2022
- Fall 2020 || Spring 2021
- Fall 2019 || Spring 2020
- Fall 2018 || Spring 2019
- Fall 2017 || Spring 2018
- Fall 2016 || Spring 2017
- Fall 2015 || Spring 2016
- Fall 2014 || Spring 2015
- Fall 2013 || Spring 2014
- Fall 2012 || Spring 2013
- Fall 2011 || Spring 2012
- Fall 2010 || Spring 2011
- Fall 2009 || Spring 2010
- Fall 2008 || Spring 2009
- Fall 2007 || Spring 2008
- Fall 2006 || Spring 2007
- Fall 2005 || Spring 2006
- Fall 2004 || Spring 2005
- Fall 2003 || Spring 2003
- Fall 2002 || Spring 2002
- Fall 2001
- Winter 2000
- Fall 1999
- Spring 1998