Title：Force correlations in disordered systems, sandpiles and hyperuniformity
Speaker：Prof. Kay Wiese (CNRS-Laboratoire de Physique de l’Ecole Normale Supérieure, Paris)
Date：2024/04/08 (Mon.)
Time：14:00
Place：4F Lecture Hall, Cosmology Hall, NTU
 
Abstract：
Many physical systems can be modeled as an elastic object subject to quenched disorder: Contact-line depinning, domain walls in disordered magnets, RNA/DNA peeling and unzipping, or charge density waves. Interestingly, the central object of the associated field theory, the renormalized force correlator of functional RG, can be measured in experiments. We show this for several examples. Via an exact mapping to conserved directed percolation, these results give for instance a hyperuniformity exponent of 1/2 for the Manna model in dimension d=1. Time permitting, I also discuss the mapping of charge-density waves to loop-erased random walks, the O(n) model at n=-2, and log-CFT.