Fractional domain walls from on-site softening in dipolar bosons

Abstract

We study dipolar bosons in a 1D optical lattice and identify a region in parameter space---strong coupling but relatively weak on-site repulsion---hosting a series of stable charge-density-wave (CDW) states whose low-energy excitations, built from "fractional domain walls," have remarkable similarities to those of non-Abelian fractional quantum Hall states. Here, a conventional domain wall between translated CDW's may be split by inserting strings of degenerate, but inequivalent, CDW states. Outside these insulating regions, we find numerous supersolids as well as a superfluid regime. The mentioned phases should be accessible experimentally and, in particular, the fractional domain walls can be created in the ground state using single-site addressing, i.e., by locally changing the chemical potential.

6 pages, 3 figures. Extended discussion. As published

References in corpus (16)

• Non-Abelian Anyons and Topological Quantum Computation
• Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
• A High Phase-Space-Density Gas of Polar Molecules
• Single-Atom Resolved Fluorescence Imaging of an Atomic Mott Insulator
• Bose-Einstein condensation of chromium
• Light-cone-like spreading of correlations in a quantum many-body system
• Single-Spin Addressing in an Atomic Mott Insulator
• Rise and fall of hidden string order of lattice bosons
• Quantum Hall system in Tao-Thouless limit
• Abelian and Non-abelian Hall Liquids and Charge Density Wave: Quantum Number Fractionalization in One and Two Dimensions
• Density wave and supersolid phases of correlated bosons in an optical lattice
• The Pfaffian quantum Hall state made simple--multiple vacua and domain walls on a thin torus
• Clustering Properties and Model Wavefunctions for Non-Abelian Fractional Quantum Hall Quasielectrons
• Degeneracy of non-abelian quantum Hall states on the torus: domain walls and conformal field theory
• Microscopic theory of the quantum Hall hierarchy
• Topological Schrödinger cats: Non-local quantum superpositions of topological defects

Cited by in corpus (10)

• Phase diagram of the extended Bose Hubbard model
• Matter-wave solitons supported by field-induced dipole-dipole repulsion with a spatially modulated strength
• Extended Bose-Hubbard Model with dipolar and contact interactions
• Staggered superfluid phases of dipolar bosons in two-dimensional square lattices
• Recent progress on quantum simulations of non-standard Bose-Hubbard models
• Dipolar Gases in Coupled One-Dimensional Lattices
• Staggered Ground States in an Optical Lattice
• Fibonacci anyon excitations of one-dimensional dipolar lattice bosons
• Magnetic phases of orbital bipartite optical lattices
• Phase diagram of a QED-cavity array coupled via a N-type level scheme