Scaling in quantum gravity

Details Scaling in quantum gravity Scaling in quantum gravity

1995-01-13

arxiv.org/abs/hep-th/9501049v1

Nucl.Phys.B445:129-144,1995

Physics

High Energy Physics

High Energy Physics - Theory

15 pages, Latex.

Scientific paper

10.1016/0550-3213(95)00154-K

The 2-point function is the natural object in quantum gravity for extracting critical behavior: The exponential fall off of the 2-point function with geodesic distance determines the fractal dimension $d_H$ of space-time. The integral of the 2-point function determines the entropy exponent $\gamma$, i.e. the fractal structure related to baby universes, while the short distance behavior of the 2-point function connects $\gamma$ and $d_H$ by a quantum gravity version of Fisher's scaling relation. We verify this behavior in the case of 2d gravity by explicit calculation.

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