Phase diagram of dipolar hard-core bosons on honeycomb lattice

TL;DR

This study explores the complex phase diagram of dipolar hard-core bosons on a honeycomb lattice, revealing multiple phases including superfluid, chiral superfluid, and density-wave, using advanced simulation methods.

Contribution

It introduces a comprehensive analysis of the phase diagram for dipolar bosons on a honeycomb lattice using slave-particle representation and quantum Monte Carlo simulations, identifying new coexisting phases.

Findings

Identification of multiple phases including Mott, superfluid, and chiral superfluid.

Discovery of a coexisting superfluid and chiral superfluid phase.

Clarification of critical behaviors of phase transitions.

Abstract

In this paper, we study phase diagrams of dipolar hard-core boson gases on the honeycomb lattice. The system is described by the Haldane-Bose-Hubbard model with complex hopping amplitudes and the nearest neighbor repulsion. By using the slave-particle representation of the hard-core bosons and also the path-integral quantum Monte-Carlo simulations, we investigate the system and to show that the systems have a rich phase diagram. There are Mott, superfluid, chiral superfluid, and sublattice chiral superfluid phases as well as the density-wave phase. We also found that there exists a coexisting phase of superfluid and chiral superfluid. Critical behaviors of the phase transitions are also clarified.