Ultrametric organization of TAP states

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Let DD be the open set from the quenched complexity formula. For f∈Df\in D, let θ\theta be the optimizer in that formula and let ζ\zeta minimize

Λ~(θ)=θinf⁡ζ: ζ([0,sup⁡(supp⁡ζ)))=θParisi(ζ).\widetilde{\Lambda}(\theta)=\theta\inf_{\zeta:\,\zeta([0,\sup(\operatorname{supp}\zeta)))=\theta}\mathcal{P}\mathrm{arisi}(\zeta).

Ultrametric organization conjecture. The TAP critical points at free-energy level ff are organized in an ultrametric tree; uniformly sampled overlaps between two such states take values in the support of ζ\zeta. If f≠feq:=inf⁡ζParisi(ζ)f\neq f_{\mathrm{eq}}:=\inf_\zeta\mathcal{P}\mathrm{arisi}(\zeta), the ancestor states have TAP free energy Parisi(ζ)≠f\mathcal{P}\mathrm{arisi}(\zeta)\neq f, and the quenched complexity of the ancestor states is 00, so their number grows at most subexponentially in NN.

References

Primary source

Jeanne Boursier, “The Legendre structure of the TAP complexity for the Ising spin glass”, arXiv:2604.20660 (2026).

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