Topological quantum many-body scars in quantum dimer models on the kagome lattice

We present a class of quantum dimer models on the kagome lattice with full translational invariance that feature a quantum many-body scar state of analytically known entanglement properties within their spectra. Using exact diagonalization on lattices of up to 60 sites, we show that nonscar states conform to the eigenstate thermalization hypothesis. Specifically, we show that energies are distributed according to the Gaussian ensemble expected of their respective symmetry sector, illustrate the existence of the scar from bipartite entanglement properties, and demonstrate revival phenomena in studies of fidelity dynamics.

Automated summary

We introduce a quantum dimer model on the kagome lattice with full translational invariance featuring a quantum many-body scar state. Through exact diagonalization, we demonstrate that nonscar states adhere to the eigenstate thermalization hypothesis by analyzing energy distribution, entanglement properties, and fidelity dynamics.