111 citations · 167 across the 9 of their papers we have counts for
9 papers
Computation of the one-loop Symanzik coefficients for the square action
Jeroen Snippe
We compute the one-loop coefficients for an alternative Symanzik improved pure gauge SU{N} lattice action (N=2 and N=3). For the standard Symanzik improved action we confirm previo…
Square Symanzik action to one-loop order
Jeroen Snippe
We present the one-loop coefficients for an alternative Symanzik improved lattice action with gauge groups SU(2) or SU(3).
A Monte Carlo study of old, new and tadpole improved actions
Margarita Garcia Perez, Jeroen Snippe, Pierre van Baal
Scaling of mass ratios in intermediate volumes, obtained with improved SU(2) lattice actions is tested against analytic results for the Wilson and continuum action. A new improved…
Improved action and Hamiltonian in finite volumes
Margarita Garcia Perez, Jeroen Snippe, Pierre van Baal
We introduce a new Symanzik improved action by adding a 2x2 plaquette in such a way that the Feynman rules in the covariant gauge simplify. We call this the square Symanzik action.…
Testing Improved Actions
Margarita Garcia Perez, Jeroen Snippe, Pierre van Baal
We discuss testing improved actions in the context of finite volume gauge theories, where both results for the continuum and the Wilson lattice action are known analytically for vo…
A new approach to instanton calculations in the O(3) nonlinear sigma model
Jeroen Snippe, Pierre van Baal
We construct all instantons in the \nlsig\ on a cylindrical space-time, known not to exist on a finite time interval. The scale parameter, , is related to the boundary condition…
Tunneling Through Sphalerons: The O(3) Sigma-Model on a Cylinder
Jeroen Snippe
We construct all instantons for the \nlsig\ on a cylinder, known not to exist on a finite time interval. We show that the widest instantons go through sphalerons. A re-interpretati…
On the top of the energy barrier. Margarita Garcia Perez
Antonio Gonzalez-Arroyo, Jeroen Snippe, Pierre van Baal
We present results related to the search of SU(2) instantons on a geometry obtained using over-improved cooling with fixed boundary conditions. We also introd…
Instantons from over-improved cooling
Margarita Garcia Perez, Antonio Gonzalez-Arroyo, Jeroen Snippe +1
Lattice artefacts are used, through modified lattice actions, as a tool to find the largest instantons in a toroidal geometry [0,L]^3X[0,T] for T to infinity. It is conjectured tha…