Semi-synthetic zigzag optical lattice for ultracold bosons

Abstract

We consider a one-dimensional "zigzag" lattice, pictured as a two-site wide single strip taken from a triangular lattice, affected by a tunable homogeneous magnetic flux piercing its triangular plaquettes. We focus on a semi-synthetic lattice produced by combining a one-dimensional spin-dependent lattice in the long direction with laser-induced transitions between atomic internal states that define the short synthetic dimension. In contrast to previous studies on semi-synthetic lattices, the atom-atom interactions are nonlocal in both lattice directions. We investigate the ground-state properties of the system for the case of strongly interacting bosons, and find that the interplay between the frustration induced by the magnetic field and the interactions gives rise to an exotic gapped phase at fractional filling factors corresponding to one particle per magnetic unit cell.

9 pages, 6 figures; v3: final version to appear in PRA

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Cited by in corpus (9)

• Topological quantum matter in synthetic dimensions
• Correlated dynamics in a synthetic lattice of momentum states
• Interaction-induced topological bound states and Thouless pumping in a one-dimensional optical lattice
• Strings of ultracold molecules in a synthetic dimension
• Genuine multipartite entanglement in a one-dimensional Bose-Hubbard model with frustrated hopping
• Interaction-induced exotic vortex states in an optical lattice clock with spin-orbit coupling
• Spin-gap spectroscopy in a bosonic flux ladder
• Synthetic gauge field in two interacting ultracold atomic gases without an optical lattice
• Meissner effect in Fock space