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4 papers · 2 filters
Fixed points of quantum gravity in higher dimensions
Peter Fischer, Daniel F. Litim
We study quantum gravity in more than four dimensions by means of an exact functional flow. A non-trivial ultraviolet fixed point is found in the Einstein-Hilbert theory. It is sho…
Nonperturbative sum over topologies in 2D Lorentzian quantum gravity
R. Loll, W. Westra, S. Zohren
The recent progress in the Causal Dynamical Triangulations (CDT) approach to quantum gravity indicates that gravitation is nonperturbatively renormalizable. We review some of the l…
SUSY Ward identities for multi-gluon helicity amplitudes with massive quarks
Christian Schwinn, Stefan Weinzierl
We use supersymmetric Ward identities to relate multi-gluon helicity amplitudes involving a pair of massive quarks to amplitudes with massive scalars. This allows to use the recent…
Fixed points of quantum gravity in extra dimensions
Peter Fischer, Daniel F. Litim
We study quantum gravity in more than four dimensions with renormalisation group methods. We find a non-trivial ultraviolet fixed point in the Einstein-Hilbert action. The fixed po…