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arXiv 1709.02709math-phhep-thmath.MP
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大Strebel图与$(3,2)$ Liouville CFT

Large Strebel graphs and $(3,2)$ Liouville CFT

Séverin Charbonnier, Bertrand Eynard, François David

摘要:

二维量子引力是这样一种思想,即一组离散化的表面(称为地图,表面上的图形),配备了图形测量,在大尺寸极限(大量的面)收敛到共形场论(CFT),并在最简单的情况下收敛到最简单的CFT,称为纯引力,也称为重力装扮(3,2)极小模型。在这里,我们考虑一组平面Strebel图(平面三价度量图)与固定的周长面,与勒贝格测度的所有边长的测量产品,提交周长限制。我们证明了一大类观测量的期望值确实收敛于(3,2)极小模型的CFT振幅。

英文摘要:

2D quantum gravity is the idea that a set of discretized surfaces (called map, a graph on a surface), equipped with a graph measure, converges in the large size limit (large number of faces) to a conformal field theory (CFT), and in the simplest case to the simplest CFT known as pure gravity, also known as the gravity dressed (3,2) minimal model. Here we consider the set of planar Strebel graphs (planar trivalent metric graphs) with fixed perimeter faces, with the measure product of Lebesgue measure of all edge lengths, submitted to the perimeter constraints. We prove that expectation values of a large class of observables indeed converge towards the CFT amplitudes of the (3,2) minimal model.

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