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cond-mat.str-el2003
Fourth-Order Perturbation Theory for the Half-Filled Hubbard Model in Infinite Dimensions
Florian Gebhard, Eric Jeckelmann, Sandra Mahlert +2
We calculate the zero-temperature self-energy to fourth-order perturbation theory in the Hubbard interaction for the half-filled Hubbard model in infinite dimensions. For the B…
cond-mat.str-el2003
Analytical and Numerical Treatment of the Mott--Hubbard Insulator in Infinite Dimensions
Michael P. Eastwood, Florian Gebhard, Eva Kalinowski +2
We calculate the density of states in the half-filled Hubbard model on a Bethe lattice with infinite connectivity. Based on our analytical results to second order in , we prop…