Fluid Membranes and 2d Quantum Gravity

Details Fluid Membranes and 2d Quantum Gravity Fluid Membranes and 2d Quantum Gravity

2011-03-05

arxiv.org/abs/1103.1089v2

Phys.Rev.D83:125021,2011

Physics

High Energy Physics

High Energy Physics - Theory

16 pages, 1 figure

Scientific paper

10.1103/PhysRevD.83.125021

We study the RG flow of two dimensional (fluid) membranes embedded in Euclidean D-dimensional space using functional RG methods based on the effective average action. By considering a truncation ansatz for the effective average action with both extrinsic and intrinsic curvature terms we derive a system of beta functions for the running surface tension, bending rigidity and Gaussian rigidity. We look for non-trivial fixed points but we find no evidence for a crumpling transition at $T\neq0$. Finally, we propose to identify the $D\rightarrow 0$ limit of the theory with two dimensional quantum gravity. In this limit we derive new beta functions for both cosmological and Newton's constants.

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