Novel Mechanism of Supersolid of Ultracold Polar Molecules in Optical Lattices

Abstract

We study the checkerboard supersolid of the hard-core Bose-Hubbard model with the dipole-dipole interaction. This supersolid is different from all other supersolids found in lattice models in the sense that superflow paths through which interstitials or vacancies can hop freely are absent in the crystal. By focusing on repulsive interactions between interstitials, we reveal that the long-range tail of the dipole-dipole interaction have the role of increasing the energy cost of domain wall formations. This effect produces the supersolid by the second-order hopping process of defects. We also perform exact quantum Monte Carlo simulations and observe a novel double peak structure in the momentum distribution of bosons, which is a clear evidence for supersolid. This can be measured by the time-of-flight experiment in optical lattice systems.

References in corpus (11)

• A High Phase-Space-Density Gas of Polar Molecules
• The physics of dipolar bosonic quantum gases
• Supersolid hardcore bosons on the triangular lattice
• Quantum Phases of Cold Polar Molecules in 2D Optical Lattices
• Ultracold dense gas of deeply bound heteronuclear molecules
• Supersolids versus phase separation in two-dimensional lattice bosons
• Supersolid phase with cold polar molecules on a triangular lattice
• Novel quantum phases of dipolar Bose gases in optical lattices
• Order-N Cluster Monte Carlo Method for Spin Systems with Long-range Interactions
• Vacancy supersolid of hard-core bosons on the square lattice
• Supersolid of Hardcore Bosons on the Face Centered Cubic Lattice

Cited by in corpus (13)

• Quantum phases of hardcore bosons with long-range interactions on a square lattice
• Ground-State Phase Diagram of the Two-Dimensional Extended Bose-Hubbard Model
• First-order phase transition and anomalous hysteresis of Bose gases in optical lattices
• Competing quantum phases of hard-core boson with tilted dipole-dipole interaction
• Quantum phases of hard-core bosons on 2D lattices with anisotropic dipole-dipole interaction
• Magnon Supersolid and Anomalous Hysteresis in Spin Dimers on a Triangular Lattice
• Superfluid, solid, and supersolid phases of dipolar bosons in a quasi-one-dimensional optical lattice
• Detecting the superfluid critical momentum of Bose gases in optical lattices through dipole oscillations
• Inhomogeneous hard-core bosonic mixture with checkerboard supersolid phase: Quantum and thermal phase diagram
• Field-induced Bose-Einstein condensation and supersolid in the two-dimensional Kondo necklace
• Supersolid phases of Rydberg-excited bosons on a triangular lattice
• Dipolar Bose-Hubbard Model in finite-size real-space cylindrical lattices
• Programmable order by disorder effect and underlying phases through dipolar quantum simulators