We consider the Kawasaki dynamics at inverse temperature $\beta$ for the Ising lattice gas on a two-dimensional square of length $2L+1$ with periodic boundary conditions. We assume that initially the particles form a square of length $n$, which may increase, as well as $L$, with $\beta$. We show that in a proper time scale the particles form almost always a square and that the center of mass of the square evolves as a Brownian motion when the temperature vanishes.
"Zero-temperature limit of the Kawasaki dynamics for the Ising lattice gas in a large two-dimensional torus." Ann. Probab. 43 (4) 2151 - 2203, July 2015. https://doi.org/10.1214/14-AOP930