6533b82efe1ef96bd129279d

RESEARCH PRODUCT

Efficient parallel tempering for first-order phase transitions

Ulrich H. E. HansmannT. NeuhausT. NeuhausMartin P. Magiera

subject

Phase transitionDensity of statesFinite systemddc:530Parallel temperingStatistical physicsPhysik (inkl. Astronomie)First orderHeat capacitySupercritical fluidMonte Carlo algorithmMathematicsJ

description

We present a Monte Carlo algorithm that facilitates efficient parallel tempering simulations of the density of states g(E) . We show that the algorithm eliminates the supercritical slowing down in the case of the Q=20 and Q=256 Potts models in two dimensions, typical examples for systems with extreme first-order phase transitions. As recently predicted, and shown here, the microcanonical heat capacity along the calorimetric curve has negative values for finite systems.

yearjournalcountryeditionlanguage
2007-01-01
10.1103/physreve.76.045701