Triangular lattice quantum dimer model with variable dimer density

TL;DR

This paper uses large-scale quantum Monte Carlo simulations to explore an extended triangular lattice quantum dimer model, revealing multiple topological and non-topological phases with implications for Rydberg atom experiments.

Contribution

It introduces an extended quantum dimer model with single dimer creation and annihilation terms and characterizes its phase diagram, including topological and symmetry-breaking phases.

Findings

Identified odd and even  spin liquids.

Discovered phases with no topological order: staggered crystal, nematic, trivial symmetric.

Abstract

Quantum dimer models are known to host topological quantum spin liquid phases, and it has recently become possible to simulate such models with Rydberg atoms trapped in arrays of optical tweezers. Here, we present large-scale quantum Monte Carlo simulation results on an extension of the triangular lattice quantum dimer model with terms in the Hamiltonian annihilating and creating single dimers. We find distinct odd and even $\mathbb{Z}_2$ spin liquids, along with several phases with no topological order: a staggered crystal, a nematic phase, and a trivial symmetric phase with no obvious broken symmetry. We also present dynamic spectra of the phases, and note implications for experiments on Rydberg atoms.