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Exact properties of the chemical potential-density relation at finite temperature in the Hubbard model

Sze-Shiang Feng·Ferdinando Mancini
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Abstract

We draw some rigorous conclusions about the functional properties of the $μ-ρ$ relation in the Hubbard model based on symmetry considerations and unitary transformations. It is shown that the charge susceptibility reaches its local extreme at half-filling. Exact expressions are obtained in two limiting cases.

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Sze-Shiang Feng, Ferdinando Mancini. 1999-11-11. Exact properties of the chemical potential-density relation at finite temperature in the Hubbard model. https://doi.org/10.1142/s0217979201004940

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