Temperature Derivative of the Superfluid Density in the Attractive Hubbard model

Preprint

13 October 1993

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9310025

Abstract

Based on extensions of the grand-canonical Quantum Monte-Carlo algorithm to incorporate magnetic fields, we provide numerical data confirming the existence of a Kosterlitz-Thouless transition in the attractive Hubbard model. Here, we calculate the temperature derivative of the superfluid density, to pin down the transition. Away from half-band filling, the above quantity, shows a response which increases with lattice size at the transition temperature. In contrast, such a signal is not observed for the case of a half-band filling.

Keywords

ATTRACTIVE HUBBARD MODEL
TEMPERATURE DERIVATIVE
SUPERFLUID DENSITY
HALF BAND FILLING
HUBBARD MODEL
ALGORITHM

All Related Versions

Version 1, 1993-10-13, ArXiv
Published version: Physical Review B, 49 (6), 4327.

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