Year: 2026
Type: preprint
Abstract: We prove that, at zero external field and for every inverse temperature $β>1$, the Parisi measure of the Sherrington-Kirkpatrick model is supported on an interval $[0,q_β]$, with a smooth density on $(0,q_β)$ and an atom at $q_β$. The primary difficulty is to exclude gaps in the support. On such a gap, the optimality conditions for the Parisi measure would force the second derivative of the associated self-consistency function $Γ$ to cross zero downward. We establish that it can only cross upward by showing that at a zero of $Γ''$, the derivative $Γ'''$ is a positive linear combination of two nonnegative covariances, one of which is strictly positive.
Source: arXiv (Cornell University)
Author: Lopatto, Patrick
Language: English
Subfield: Statistics and Probability
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7168237781