Preprint
Jul 2026
Spectral Gap of the Davies Generator for the Mean-Field Heisenberg Model
The mean-field Heisenberg ferromagnet is a quantum spin model on the complete graph with isotropic spin-1/2 interactions. This non-commuting Hamiltonian is permutation and $\mathsf{SU}(2)$ invariant, and its Gibbs states undergo an $\mathsf{SU}(2)$ symmetry breaking phase transition at inverse temperature $\beta=2$. We...
J. Basso, Thiago Bergamaschi, Lin Lin et al.
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