4 papers
2D Crystal Shapes, Droplet Condensation and Exponential Slowing Down in Simulations of First-Order Phase Transitions
Thomas Neuhaus, Johannes S. Hager
Multicanonical ensemble simulations for the simulation of first-order phase transitions suffer from exponential slowing down. Monte Carlo autocorrelation times diverge exponentiall…
Multicanonical Study of Continuum Physics in the D=2 Nonlinear Sigma Model
T. Neuhaus
Employing a variant of the Multicanonical Ensemble we study twisted spin configurations on periodic boxes in the nonlinear sigma model for -values inbetween …
Non-Gaussian fixed point candidates in the 4D compact U(1) gauge theories
W. Franzki, J. Jersak, C. B. Lang +1
Some interesting nonperturbative properties of the strongly coupled 4D compact U(1) lattice gauge theories, both without and with matter fields, are pointed out. We demonstrate tha…
Multimagnetical Simulations
U. Hansmann, B. A. Berg, T. Neuhaus
We modified the recently proposed multicanonical MC algorithm for the case of a magnetic field driven order--order phase transition. We test this {\it multimagnetic} Monte Carlo al…