Two analytic approximations for thed+1 ising model
The Hamiltonian Ising model ind+1 dimensions is studied by means of two new approximation methods which exploit the geometry of the model. Explicit results for the critical temperature and observables of the theory are obtained.
PACS 64.60General studies of phase transitions
PACS 05.50Lattice theory and statistics Ising problems
PACS 11.10.EfLagrangian and Hamiltonian approach
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