A new perspective on matter coupling in 2d quantum gravity

Details A new perspective on matter coupling in 2d quantum gravity A new perspective on matter coupling in 2d quantum gravity

1999-04-02

arxiv.org/abs/hep-th/9904012v1

Phys.Rev. D60 (1999) 104035

Physics

High Energy Physics

High Energy Physics - Theory

24 pages, 7 figures (postscript)

Scientific paper

10.1103/PhysRevD.60.104035

We provide compelling evidence that a previously introduced model of non-perturbative 2d Lorentzian quantum gravity exhibits (two-dimensional) flat-space behaviour when coupled to Ising spins. The evidence comes from both a high-temperature expansion and from Monte Carlo simulations of the combined gravity-matter system. This weak-coupling behaviour lends further support to the conclusion that the Lorentzian model is a genuine alternative to Liouville quantum gravity in two dimensions, with a different, and much `smoother' critical behaviour.

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