Wolfhard Janke A, Ralph Kenna B
A new method to extract the density of partition function zeroes (a continuous function) from their distribution for finite lattices (a discrete data set) is presented. This allows direct...
Spin models on random lattices www.elsevier.com/locate/physa (2009)
Wolfhard Janke A, Ramon Villanova C
Under certain conditions phase transitions in systems with quenched disorder are expected to exhibit a di erent behaviour than in the corresponding pure system. Here we discuss a series of Monte...
Phase transition strengths from the density of partition function zeroes (2008)
Wolfhard Janke A, Ralph Kenna B
We report on a new method to extract thermodynamic properties from the density of partition function zeroes on finite lattices. This allows direct determination of the order and strength of phase...
Density of Partition function Zeroes and Phase Transition Strength Abstract (2008)
Wolfhard Janke A, Ralph Kenna B
A new method to extract the density of partition function zeroes (a continuous function) from their distribution for finite lattices (a discrete data set) is presented. This allows direct...
Percolation of vortices in the 3D Abelian lattice Higgs model (2007)
Ro Wenzel A, Elmar Bittner A, Wolfhard Janke A
The compact Abelian Higgs model is simulated on a cubic lattice where it possesses vortex lines and pointlike magnetic monopoles as topological defects. The focus of this high-precision Monte Carlo...
Wolfhard Janke A, Martin Weigel B, N. Glover
We consider the fractal dimensions of critical clusters occurring in configurations of a q-state Potts model coupled to the planar random graphs of the dynamical triangulations approach to Euclidean...
www.elsevier.com/locate/cpc Critical exponents from general distributions of zeroes (2005)
Wolfhard Janke A, Des Johnston B, Ralph Kenna C
All of the thermodynamic information on a statistical mechanical system is encoded in the locus and density of its partition function zeroes. Recently, a new technique was developed which enables the...
Nuclear Physics B 719 [FS] (2005) 312–346 The F model on dynamical quadrangulations (2005)
Martin Weigel A, Wolfhard Janke A
The dynamically triangulated random surface (DTRS) approach to Euclidean quantum gravity in two dimensions is considered for the case of the elemental building blocks being quadrangles instead of the...
Physics Letters B 460 1999 271–275 The wrong kind of gravity (1999)
that coupling central charge cF1 spin models to 2D quantum gravity dresses the conformal weights to get new critical exponents, where the relation between the original and dressed weights depends...
www.elsevier.nl/locate/npe Ising and Potts models on quenched random
Test of variational approximation for +4 quantum chain (1994)
Monte Carlo Simulation, Wolfhard Janke A, Tilman Sauer B, Communicated A. Lagendijk
We report results of a Monte Carlo simulation of the @4 quantum chain. In order to enhance the efficiency of the simulation we combine muItig~d simulation techniques with a refined discretization...