Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1995-08-14
Int.J.Mod.Phys. A12 (1997) 757-780
Physics
High Energy Physics
High Energy Physics - Theory
16 pages, Figures are not included
Scientific paper
We analyse MINBU distribution of 2 dimensional quantum gravity. New data of R$^2$-gravity by the Monte Carlo simulation and its theoretical analysis by the semiclassical approach are presented. The cross-over phenomenon takes place at some size of the baby universe where the randomness competes with the smoothing force of $R^2$-term. The dependence on the central charge $c_m$\ and on the $R^2$-coupling are explained for the ordinary 2d quantum gravity and for $R^2$-gravity. The $R^2$-Liouville solution plays the central role in the semiclassical analysis. A total derivative term (surface term) and the infrared regularization play important roles . The surface topology is that of a sphere.
Ichinose Shoichi
Tsuda Norio
Yukawa Tetsuyuki
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