Andreev-Lifshitz supersolid revisited for a few electrons on a square lattice I
Georgios Katomeris, Franck Selva, Jean-Louis Pichard
Abstract
In 1969, Andreev and Lifshitz have conjectured the existence of a supersolid phase taking place at zero temperature between the quantum liquid and the solid. In this and a succeeding paper, we re-visit this issue for a few polarized electrons (spinless fermions) interacting via a U/r Coulomb repulsion on a two dimensional L * L square lattice with periodic boundary conditions and nearest neighbor hopping.
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