A continuum approximation for the excitations of the (1,1,...,1) interface in the quantum Heisenberg model
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A continuum approximation for the excitations of the (1,1,...,1) interface in the quantum Heisenberg model

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https://arxiv.org/pdf/math-ph/9909018.pdf
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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.

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