Lattice models with long-range and number-non-conserving interactions with Zeeman excitations of ultracold magnetic atoms

TL;DR

This paper demonstrates how Zeeman excitations of ultracold Dy atoms in optical lattices can be used to engineer tunable extended Hubbard models with long-range and non-conserving interactions, enabling studies of localization phenomena.

Contribution

It introduces a method to control inter-site and particle number-non-conserving interactions in Hubbard models using Zeeman states of ultracold atoms.

Findings

Tunable ratio of hopping and interaction strengths achieved.

Proposed models for studying Anderson localization with non-conserving particle number.

Framework for exploring effects of long-range interactions in quantum simulations.

Abstract

We show that Zeeman excitations of ultracold Dy atoms trapped in an optical lattice can be used to engineer extended Hubbard models with tunable inter-site and particle number-non-conserving interactions. We show that the ratio of the hopping amplitude and inter-site interactions in these lattice models can be tuned in a wide range by transferring the atoms to different Zeeman states. We propose to use the resulting controllable models for the study of the effects of direct particle interactions and particle number-non-conserving terms on Anderson localization.