6 papers
The Static Potential with Hypercubic Blocking
A. Hasenfratz, R. Hoffmann, F. Knechtli
We measure the static potential from Wilson loops constructed using hypercubic blocked (HYP) links. The HYP potential agrees with the potential measured using thin links for distan…
Simulating dynamical fermions with smeared links
A. Hasenfratz, F. Knechtli
Smearing the gauge links of dynamical configurations removes small scale unphysical vacuum fluctuations and thus improves the chiral properties of lattice fermions. Recently we pro…
Two Flavors of Staggered Fermions with Smeared Links
Anna Hasenfratz, Francesco Knechtli
Staggered fermions with smeared links can have greatly improved chiral properties. In a recent paper we introduced a simple and effective method to simulate four flavors of stagger…
Four Flavor Finite Temperature Phase Transition with HYP Action: Where is the First Order Phase Transition Line?
A. Hasenfratz, F. Knechtli
We study the finite temperature phase transition of four flavor staggered fermions with hypercubic fat link actions on N_t=4 and N_t=6 temporal lattices. Our fat links are construc…
Lattice Gauge Theory
Hartmut Wittig
The status of lattice calculations in Quantum Field Theory is reviewed. A major part is devoted to recent progress in formulating exact chiral symmetry on the lattice. Another topi…
Optimizing the Chiral Properties of Lattice Fermion Actions
Thomas DeGrand, Anna Hasenfratz, Tamás G. Kovács
We describe a way to optimize the chiral behavior of Wilson-type lattice fermion actions by studying the low energy real eigenmodes of the Dirac operator. We find a candidate actio…