The parabolic Airy process rate-function contraction conjecture

Let DD be the space of admissible directed-landscape environments, let II be the associated rate function, and let QQ be the Dirichlet energy of a function f:RRf:\mathbb R\to\mathbb R defined by

Q(f)=14R(f(x)24x2)dxQ(f)=\frac14\int_{\mathbb R}(f'(x)^2-4x^2)\,dx

for absolutely continuous ff satisfying f(x)x2f(x)\ge -x^2 and f(x)x20f(x)-x^2\to0 as x±x\to\pm\infty, with Q(f)=Q(f)=\infty otherwise. The parabolic Airy process rate-function contraction conjecture. For any function f:RRf:\mathbb R\to\mathbb R,

min{I(e):eD, e(0,0;,1)=f}=Q(f).\min\{I(e):e\in\mathcal D,\ e(0,0;\cdot,1)=f\}=Q(f).

This is the proposed large-deviation principle for the parabolic Airy process, obtained by analogy with the Brownian proxy and Schilder's theorem. Establishing the principle is described as an open problem and is expected to require methods handling the more delicate structure of the parabolic Airy process.

Sources & referencesView supporting material

Primary source

Sayan Das, Duncan Dauvergne and Bálint Virág, “Upper tail large deviations of the directed landscape”, arXiv:2405.14924 (2024).

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