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Armenian Journal of Physics=Ֆիզիկայի հայկական հանդես
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Title:
A Soluble Modified Fermi-Hubbard Model
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Uncontrolled Keywords:
Fermi-Hubbard model ; recurrence-relation ansatz ; modified Fermi-Hubbard model ; grand canonical ensemble ; thermodynamic variables ; continuous phase transition
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Abstract:
A recently introduced recurrence-relation ansatz applied to the Bose-Hubbard model is here used in the Fermi-Hubbard model. The resulting modified Fermi-Hubbard model is soluble and exhibits a continuous phase transition (second order) reminiscent of the integer quantum Hall resistance and a ground-state, first-order phase transition.