We discuss the recently proposed multicanonical multigrid Monte Carlo method and apply it to the scalar phi(4)-model on a square lattice. To investigate the performance of the new algorithm at the field-driven first-o...
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We discuss the recently proposed multicanonical multigrid Monte Carlo method and apply it to the scalar phi(4)-model on a square lattice. To investigate the performance of the new algorithm at the field-driven first-order phase transitions between the two ordered phases we carefully analyze the autocorrelations of the Monte Carlo process. Compared with standard multicanonical simulations a real-time improvement of about one order of magnitude is established. The interface tension between the two ordered phases is extracted from high-statistics histograms of the magnetization applying histogram reweighting techniques.
We present a multicanonical algorithm for the SU(3) pure gauge theory at the deconfinement phase transition. We measure the tunneling times for lattices of size L 2 ×2 for L=8, 10, and 12. In contrast to the cano...
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We present a multicanonical algorithm for the SU(3) pure gauge theory at the deconfinement phase transition. We measure the tunneling times for lattices of size L 2 ×2 for L=8, 10, and 12. In contrast to the canonical algorithm the tunneling time increases only moderately with L. Finally, we determine the interfacial free energy applying the multicanonical algorithm.
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