Overlap distribution of the three-dimensional Ising model.
We study the Parisi overlap probability density P(L)(q) for the three-dimensional Ising ferromagnet by means of Monte Carlo (MC) simulations. At the critical point, P(L)(q) is peaked around q=0 in contrast with the double peaked magnetic probability density. We give particular attention to the tails of the overlap distribution at the critical point, which we control over up to 500 orders of magnitude by using the multioverlap MC algorithm. Below the critical temperature, interface tension estimates from the overlap probability density are given and their approach to the infinite volume limit appears to be smoother than for estimates from the magnetization.
Berg
Bernd A
BA
Department of Physics, The Florida State University, Tallahassee, Florida 32306, USA. berg@hep.fsu.edu
Billoire
Alain
A
Janke
Wolfhard
W