Neuhaus, Thomas; Magiera, Martin; Hansmann, Ulrich H. E.:

Efficient parallel tempering for first-order phase transitions

In: Physical review : E, Jg. 76 (2007) ; Nr. 4, S. 045701 (4 pages)
ISSN: 1550-2376, 1539-3755
Zeitschriftenaufsatz / Fach: Physik
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.