Superfluid density and the Drude weight of the Hubbard model
- 4 May 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 68 (18) , 2830-2833
- https://doi.org/10.1103/physrevlett.68.2830
Abstract
We study the superfluid density and the Drude weight of the Hubbard model by investigating two different limiting behaviors of the current-current correlation function. These quantities provide criteria which allow one to distinguish between superconducting, metallic, and insulating ground states of an interacting many-body system. Monte Carlo calculations are performed to study these quantities.Keywords
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