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Classical and quantum Heisenberg model

  1. Jun 6, 2013 #1
    In quantum Heisenberg model
    [tex]\hat{H}=-J\sum_{\vec{n},\vec{m}}\hat{\vec{S}}_{\vec{n}}\cdot \hat{\vec{S}}_{\vec{m}}[/tex]
    ##J## can be obtained from dispersion experiment. For large spin ##S## even classical Heisenberg model is good for description of Curie temperature for example. Is that with the same ##J## which is obtained from dispersion law? Thanks for the answer! Maybe you know some reference.
     
    Last edited: Jun 6, 2013
  2. jcsd
  3. Jun 10, 2013 #2
    For example you have spin ##S=\frac{7}{2}## and for example ##J=10## quantum Heisenberg model. And you have Monte Carlo simulation code for classical Heisenberg ##S=\infty##. What should you use for ##J## in classical Heisenberg model Monte Carlo code?
     
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