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arXiv 0901.0277math-phmath.MP
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Liouville量子引力中的对偶性和KPZ

Duality and KPZ in Liouville Quantum Gravity

Bertrand Duplantier, Scott Sheffield

摘要:

给出了欧氏平面域D中标度指数与刘维量子引力中标度指数之间KPZ关系的一个(数学上严格的)概率和几何证明.它使用适当正则化的量子面积测度dμ_γ=ε^{γ^2/2} e^{γh_ε(z)}dz,其中dz是D上的勒贝格测度,γ是实参数,0 \leq γ<2,h_ε(z)表示D上高斯自由场实例h在以z为中心的半径为ε的圆上的平均值。证明扩展到边界几何。奇异情形γ>2与量子测度dμ_{λ '},γ' < 2,通过基本对偶γ λ '= 4相联系。

英文摘要:

We present a (mathematically rigorous) probabilistic and geometrical proof of the KPZ relation between scaling exponents in a Euclidean planar domain D and in Liouville quantum gravity. It uses the properly regularized quantum area measure dμ_γ=ε^{γ^2/2} e^{γh_ε(z)}dz, where dz is Lebesgue measure on D, γis a real parameter, 0\leq γ<2, and h_ε(z) denotes the mean value on the circle of radius εcentered at z of an instance h of the Gaussian free field on D. The proof extends to the boundary geometry. The singular case γ>2 is shown to be related to the quantum measure dμ_{γ'}, γ' < 2, by the fundamental duality γγ'=4.

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