Particle-hole bound states of dipolar molecules in optical lattice

Abstract

We investigate the particle-hole pair excitations of dipolar molecules in optical lattice, which can be described with an extended Bose-Hubbard model. For strong enough dipole-dipole interaction, the particle-hole pair excitations can form bound states in one and two dimensions. With decreasing dipole-dipole interaction, the energies of the bound states increase and merge into the particle-hole continuous spectrum gradually. The existence regions, the energy spectra and the wave functions of the bound states are carefully studied and the symmetries of the bound states are analyzed with group theory. For a given dipole-dipole interaction, the number of bound states varies in momentum space and a number distribution of the bound states is illustrated. We also discuss how to observe these bound states in future experiments.

8 pages, 8 figures

References in corpus (14)

• Many-Body Physics with Ultracold Gases
• A High Phase-Space-Density Gas of Polar Molecules
• Strongly correlated 2D quantum phases with cold polar molecules: controlling the shape of the interaction potential
• Ultracold dense gas of deeply bound heteronuclear molecules
• Supersolids versus phase separation in two-dimensional lattice bosons
• Metastable states of a gas of dipolar bosons in a 2D optical lattice
• Magneto-electrostatic trapping of ground state OH molecules
• Exploring correlated 1D Bose gases from the superfluid to the Mott-insulator state by inelastic light scattering
• Detecting the Amplitude Mode of Strongly Interacting Lattice Bosons by Bragg Scattering
• Preparation of a quantum state with one molecule at each site of an optical lattice
• Density wave and supersolid phases of correlated bosons in an optical lattice
• Excitons in the One-Dimensional Hubbard Model: a Real-Time Study
• Supersolidity from defect-condensation in the extended boson Hubbard model
• Two-channel Feshbach physics in a structured continuum