A new Stein-method-based Gaussian approximation controls the full correlation structure of Ising models with a single negative eigenvalue outlier, delivering near-optimal mixing times where prior spectral methods break down.
el Ducatez, and Antti Knowles. Extremal eigenvalues of critical E rd\
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Fast mixing in Ising models with a negative spectral outlier via Gaussian approximation
A new Stein-method-based Gaussian approximation controls the full correlation structure of Ising models with a single negative eigenvalue outlier, delivering near-optimal mixing times where prior spectral methods break down.