Exotic order in simple models of bosonic systems

TL;DR

This paper demonstrates that simple Bose Hubbard models with unfrustrated hopping and short-range interactions can host stable fractionalized phases in multiple dimensions without magnetic fields, paving the way for experimental realization.

Contribution

It introduces simple Bose Hubbard models capable of supporting fractionalized phases, advancing the understanding of unconventional states in bosonic systems.

Findings

Stable fractionalized phases exist in simple Bose Hubbard models

These phases occur in two or higher dimensions without magnetic fields

Models are suitable for experimental realization

Abstract

We show that simple Bose Hubbard models with unfrustrated hopping and short range two-body repulsive interactions can support stable fractionalized phases in two and higher dimensions, and in zero magnetic field. The simplicity of the constructed models advances the possibility of a controlled experimental realization and novel applications of such unconventional states.