507 citations · 2.6k across the 38 of their papers we have counts for
5 papers · 1 filter
Instantons and the fixed point topological charge in the two-dimensional O(3) sigma-model
Marc Blatter, Rudolf Burkhalter, Peter Hasenfratz +1
We define a fixed point topological charge for the two-dimensional O(3) lattice sigma-model which is free of topological defects. We use this operator in combination with the fixed…
Fixed point actions for SU(3) gauge theory
T. DeGrand, A. Hasenfratz, P. Hasenfratz +1
We summarize our recent work on the construction and properties of fixed point (FP) actions for lattice pure gauge theory. These actions have scale invariant instanton solu…
The absence of cut--off effects for the fixed point action in 1--loop perturbation theory
F. Farchioni, P. Hasenfratz, F. Niedermayer +1
In order to support the formal renormalization group arguments that the fixed point action of an asymptotically free model gives cut--off independent physical predictions in 1--loo…
Non--perturbative tests of the fixed point action for SU(3) gauge theory
T. DeGrand, A. Hasenfratz, P. Hasenfratz +1
In this paper (the second of a series) we extend our calculation of a classical fixed point action for lattice pure gauge theory to include gauge configurations with large…
The classically perfect fixed point action for SU(3) gauge theory
T. DeGrand, A. Hasenfratz, P. Hasenfratz +1
In this paper (the first of a series) we describe the construction of fixed point actions for lattice pure gauge theory. Fixed point actions have scale invariant instanton…