A search for correlation-induced adiabatic paths between distinct topological insulators

Understand

Correlations in topological states of matter provide a rich phenomenology, including a reduction in the topological classification of the interacting system compared to its non-interacting counterpart.

• This happens when two phases that are topologically distinct on the non-interacting level become adiabatically connected once interactions are included.
• We use a quantum Monte Carlo method to study such a reduction.
• We consider a 2D charge-conserving analog of the Levin-Gu superconductor whose classification is reduced from $\mathbb{Z}$ to $\mathbb{Z}_4$.