Oscar Bolina, Pierluigi Contucci, Bruno Nachtergaele, Shannon Starr A continuum approximation for the excitations of the (1,1,...,1) interface in the quantum Heisenberg model (28K, Latex) ABSTRACT. It is shown that, with an appropriate scaling, the energy of low-lying excitations of the (1,1,...,1) interface in the d-dimensional quantum Heisenberg model are given by the spectrum of the d-1-dimensional Laplacian on an suitable domain.