Lattice Laughlin states of bosons and fermions at filling fractions 1/q

Abstract

We introduce a two-parameter family of strongly-correlated wave functions for bosons and fermions in lattices. One parameter, q , is connected to the filling fraction. The other one, η , allows us to interpolate between the lattice limit ( $\eta =1$ ) and the continuum limit ( $\eta \to {{0}^{+}}$ ) of families of states appearing in the context of the fractional quantum Hall effect or the Calogero–Sutherland model. We give evidence that the main physical properties along the interpolation remain the same. Finally, in the lattice limit, we derive parent Hamiltonians for those wave functions and in 1D, we determine part of the low-energy spectrum.

Keywords

• fractional quantum Hall effect
• Luttinger liquid
• conformal field theory
• matrix product state
• entanglement
• topological phase