Abstract

Critical prewetting in the 2d Ising model D. Ioffe, S. Ott, S. Shlosman, Y. Velenik Annals of Probability 50, 1127-1172 (2022). In this paper we develop a detailed analysis of critical prewetting in the context of the two-dimensional Ising model. Namely,we consider a two-dimensional nearest-neighbor Ising model in a $2N\times N$ rectangular box with a boundary condition inducing the coexistence of the $+$ phase in the bulk and a layer of $-$ phase along the bottom wall. The presence of an external magnetic field of intensity $h=\lambda/N$ (for some fixed $\lambda>0$) makes the layer of $-$ phase unstable. For any $\beta>\beta_{\rm c}$, we prove that, under a diffusing scaling by $N^{-2/3}$ horizontally and $N^{-1/3}$ vertically, the interface separating the layer of unstable phase from the bulk phase weakly converges to an explicit Ferrari-Spohn diffusion. Key words: Ising model, Ferrari-Spohn diffusion, interface, invariance principle, critical prewetting Files: PDF file, Published version, bibtex, slides 1, talk 1, slides 2, talk 2