All-Order Quantum Gravity in Two Dimensions

Details All-Order Quantum Gravity in Two Dimensions All-Order Quantum Gravity in Two Dimensions

1993-07-10

arxiv.org/abs/hep-th/9307074v1

Nucl.Phys. B418 (1994) 257-277

Physics

High Energy Physics

High Energy Physics - Theory

22 pages (phyzzx.tex, figures available by mail upon request), SLAC-PUB 6274 T

Scientific paper

10.1016/0550-3213(94)90247-X

We derive curvature counterterms in two-dimensional gravity coupled to conformal matter up to infinite order. By construction the higher-order action is equivalent to a finite first-order theory with auxiliary scalar. Due to this equivalence it shares the following remarkable properties: There is no need for gravitational dressing of the cosmological constant, quantization is consistent for any conformal anomaly $c$ of the coupled matter system, and if the coupled matter system is a $c=d~$-dimensional string theory in a Euclidean background then the effective string theory is $D=d+2~$-dimensional with Minkowski signature $(1,D-1)$. The resulting quantum theory favours flat geometries and suppresses both parabolic and hyperbolic singularities.

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