Distance statistics in quadrangulations with no multiple edges and the geometry of minbus

Details Distance statistics in quadrangulations with no multiple edges and the geometry of minbus Distance statistics in quadrangulations with no multiple edges and the geometry of minbus

2010-02-12

arxiv.org/abs/1002.2552v2

J. Phys. A: Math. Theor. 43 (2010) 205207

Physics

Mathematical Physics

39 pages, 9 figures

Scientific paper

10.1088/1751-8113/43/20/205207

We present a detailed calculation of the distance-dependent two-point function for quadrangulations with no multiple edges. Various discrete observables measuring this two-point function are computed and analyzed in the limit of large maps. For large distances and in the scaling regime, we recover the same universal scaling function as for general quadrangulations. We then explore the geometry of "minimal neck baby universes" (minbus), which are the outgrowths to be removed from a general quadrangulation to transform it into a quadrangulation with no multiple edges, the "mother universe". We give a number of distance-dependent characterizations of minbus, such as the two-point function inside a minbu or the law for the distance from a random point to the mother universe.

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