An exact solution for the KPZ equation with flat initial conditions
Statistical Mechanics
2011-07-28 v1
Abstract
We provide the first exact calculation of the height distribution at arbitrary time of the continuum KPZ growth equation in one dimension with flat initial conditions. We use the mapping onto a directed polymer (DP) with one end fixed, one free, and the Bethe Ansatz for the replicated attractive boson model. We obtain the generating function of the moments of the DP partition sum as a Fredholm Pfaffian. Our formula, valid for all times, exhibits convergence of the free energy (i.e. KPZ height) distribution to the GOE Tracy Widom distribution at large time.
Cite
@article{arxiv.1104.1993,
title = {An exact solution for the KPZ equation with flat initial conditions},
author = {Pasquale Calabrese and Pierre Le Doussal},
journal= {arXiv preprint arXiv:1104.1993},
year = {2011}
}
Comments
4 pages, no figure