In general, the $p$-spin glass model focuses on $p$-body interactions like $${\displaystyle H({\boldsymbol {\sigma }})=\sum_{i_1,...,i_p} J_{i_{1},\ldots i_{p}} \sigma _{i_{1}}\cdots \sigma _{i_{p}}.}$$ But what is the physical significance of this Hamiltonian? Does there exist any system that has this p-body interaction among p spins? It makes sense to me only when it looks like the Ising model, i.e. p=2 and sum over all adjacent sites...
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$\begingroup$ looks like a generalization of the Sherrington–Kirkpatrick model. For $p$ tending to infinity it reproduces the "random energy model": en.wikipedia.org/wiki/Random_energy_model . Also: section 8.2 here: web.stanford.edu/~montanar/RESEARCH/BOOK/partB.pdf and this paper: journals.aps.org/prl/abstract/10.1103/PhysRevLett.45.79 $\endgroup$– QuilloJan 3, 2023 at 13:55
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