534 citations · 3.2k across the 70 of their papers we have counts for
6 papers · 1 filter
Triviality of theory: small volume expansion and new data
Peter Weisz, Ulli Wolff
We study a renormalized coupling g and mass m in four dimensional phi^4 theory on tori with finite size z=mL. Precise numerical values close to the continuum limit are reported for…
Running of the SF-coupling with four massless flavours
Rainer Sommer, Fatih Tekin, Ulli Wolff
We discuss the status of different determinations of alpha_s, motivating a precise and reliable computation from lattice QCD. In order to suppress perturbative errors, the non-pert…
A worm-inspired algorithm for the simulation of Abelian gauge theories
Tomasz Korzec, Ulli Wolff
We present an algorithm in which the all-order strong coupling expansion of the Abelian U(1) gauge theory with Wilson plaquette action is sampled. In addition to the vacuum closed…
Strong coupling expansion Monte Carlo
Ulli Wolff
We give an overview on recently accomplished successful generalizations of `worm' or loop gas simulation methods to O(N) and CP(N-1) sigma models and to simple fermion models. Besi…
The running coupling of QCD with four flavors
Fatih Tekin, Rainer Sommer, Ulli Wolff
We have calculated the step scaling function and the running coupling of QCD in the Schroedinger functional scheme with four flavors of O(a) improved Wilson quarks. Comparisons of…
Simulating the All-Order Strong Coupling Expansion IV: CP(N-1) as a loop model
Ulli Wolff
We exactly reformulate the lattice CP(N-1) spin model on a D dimensional torus as a loop model whose configurations correspond to the complete set of strong coupling graphs of the…