The negative-curvature JT area-tail conjecture

Let ρβq(A)\rho^-_{\beta_{\mathrm q}}(A) be the area distribution of JT gravity with negative curvature 2/L2-2/L^2, coupled to conformal matter with c0c\leq0, and let ν\nu be the corresponding critical exponent. Negative-curvature area-tail conjecture. There are a strictly positive constant κν\kappa^-_\nu and a strictly increasing exponent χν\chi^-_\nu such that

lnρβq(A)κν(AβqνL)χν(A+),\ln\rho^-_{\beta_{\mathrm q}}(A)\sim-\kappa^-_\nu\left(\frac{A}{\beta_{\mathrm q}^{\nu}L}\right)^{\chi^-_\nu}\qquad(A\to+\infty),

with

limν1/2+χν=2,limν1χν=+.\lim_{\nu\to1/2^+}\chi^-_\nu=2,\qquad\lim_{\nu\to1^-}\chi^-_\nu=+\infty.

The predicted tail is rapidly decaying enough to allow all cosmological constants and is motivated by hyperbolic Brownian-path behavior and the semiclassical limit.

Sources & referencesView supporting material

Primary source

Frank Ferrari, “Random Disks of Constant Curvature: the Lattice Story”, arXiv:2406.06875 (2024).

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