Ground state properties of the 2D disordered Hubbard model
Gaetan Caldara, Bhargavi Srinivasan, Dima Shepelyansky
Abstract
We study the ground state of the two-dimensional (2D) disordered Hubbard model by means of the projector quantum Monte Carlo (PQMC) method. This approach allows us to investigate the ground state properties of this model for lattice sizes up to 10 × 10, at quarter filling, for a broad range of interaction and disorder strengths. Our results show that the ground state of this system of spin-1/2 fermions remains localised in the presence of the short-ranged Hubbard interaction.
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