We compare predictions of the Capillary Wave Model with Monte Carlo results for the energy gap and the interface energy of the 3D Ising model in the scaling region. Our study reveals that the finite size effects of these quantities are well described by the Capillary Wave Model, expanded to two-loop order (one order beyond the Gaussian approximation). ((orig.)).
Caselle, M;  Gliozzi, F;  Vinti, S;  Fiore, R;  Hasenbusch, M;  Pinn, K 
- Turin Univ. (Italy). Ist. di Fisica Teorica
- Dipartimento di Fisica Teorica, Universita della Calabria, 87030 Cosenza (Italy)
- Cambridge Univ. (United Kingdom). Dept. of Applied Mathematics and Theoretical Physics (DAMTP)
- Institut fuer Theoretische Physik I, Universitaet Muenster, Wilhelm-Klemm-Str. 9, 48149 Muenster (Germany)