3 papers
hep-lat1996
New fixed point action for SU(3) lattice gauge theory
Marc Blatter, Ferenc Niedermayer
We present a new fixed point action for SU(3) lattice gauge theory, which has --- compared to earlier published fixed point actions --- shorter interaction range and smaller violat…
hep-lat1995
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…
hep-lat1994
Perfect topological charge for asymptotically free theories
M. Blatter, R. Burkhalter, P. Hasenfratz +1
The classical equations of motion of the perfect lattice action in asymptotically free spin and gauge models possess scale invariant instanton solutions. This property…