Non-Abelian fractional Chern insulators from an exactly solvable two-body model

TL;DR

This paper introduces exactly solvable lattice models with flat bands mimicking Landau levels, enabling the realization of both Abelian and non-Abelian fractional Chern insulators with potential for hosting exotic anyons.

Contribution

The authors construct a class of lattice Hamiltonians with flat bands that reproduce Landau level structures and are exactly solvable, facilitating the study of complex FCIs.

Findings

Confirmed zero-mode counting for bosonic Jain-21 state

Realized non-Abelian 22- and 33-states with anyonic excitations

Provided a framework for multi Landau-level physics on lattices

Abstract

We construct a class of lattice Hamiltonians whose single-particle spectrum consists of an arbitrary number of exactly degenerate flat bands that reproduce the analytic structure of the first $p$ Landau levels restricted to the lattice. When combined with local bosonic contact interactions, these models become exactly solvable frustration-free parent Hamiltonians for FCIs that realize both Abelian and non-Abelian parton quantum Hall states. Using exact diagonalization, we confirm the expected zero-mode counting for variants of the model stabilizing the bosonic Jain-21 state as well as the non-Abelian 22- and 33-states, which are expected to support Ising- and Fibonacci-type anyons, respectively. Our construction provides an exactly solvable lattice realization of multi Landau-level physics and offers a new framework for studying FCIs with Chern number $C > 1$. More broadly, it supplies a family of idealized lattice models that capture the analytic structure of continuum Landau levels while remaining compatible with exponentially local hopping.