1995
DOI: 10.1063/1.530948
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Multivariable Grassmann integrals and the high temperature expansion of interacting fermionic models

Abstract: Using the noncommuting nature of fermionic fields we obtain a nonperturbative method to calculate the high temperature limit of the grand canonical partition function of interacting fermionic models. This nonperturbative approach is applied to the Hubbard model in d=2(1+1) and we recover the known results in the limit T → ∞.

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