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Homework Help: Explain why the entropy is non-nul

  1. Jan 23, 2015 #1
    1. The problem statement, all variables and given/known data

    Given the hamiltonian

    Show that

    3. The attempt at a solution


    I cannot explain why S=0

    Attached Files:

    Last edited: Jan 23, 2015
  2. jcsd
  3. Jan 25, 2015 #2
    One thing you may be able do for is use the exact solution for the partition function ##Z## of the Ising chain.
    ##S = \partial_T k_B T \ln Z##

    In other situations like this one may be able to start by using ##S = k_B \ln \Omega(T, H) ##, where ##\Omega(T, H) ## is the number of states corresponding to T and H.
    Last edited: Jan 25, 2015
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