Antiferromagnetic Ising model applet: Metropolis algorithm

As opposed to the ferromagnetic Ising/Potts models, the coupling constant J for the AF model is negative, thus favoring spin anti-alignement at low temperature (press the "Groundstate" button and look at the lattice: the ground-state is indeed a checkerboard).

Applet help:

  • The "temperature" button let you configure many things regarding the simulation, e.g. temperature sweep, number of thermalization steps, number of measurements, autocorrelation times, ...
  • if the applet runs too slowly, reduce the "Latency". If still slow, deselect the "Animate" checkbox.
  • The south-panel displays charts of thermodymical averages as a funtion of temperature. You can add a new point at any time during a simulation by clicking on the "Add point" button. If a temperature sweep is carried out, charts are filled automatically.

Download source code : montecarlo.zip

S. Reynal (ENSEA/UCP)