Quasi-molecular bosonic complexes -- a pathway to atomic analog of SQUID with controlled sensitivity

TL;DR

This paper explores quantum phases of dipolar bosons in layered optical lattices and proposes a SQUID-like device with enhanced rotational sensitivity based on composite superfluids.

Contribution

It provides a detailed description of quantum phases in layered dipolar bosonic systems and introduces a novel SQUID-type device with controlled sensitivity using composite superfluids.

Findings

Identification of threshold-less quantum phases such as superfluids and solids.

Demonstration of enhanced rotational sensitivity in a SQUID-like device.

Potential for engineering novel quantum devices with dipolar gases.

Abstract

Recent experimental advances in realizing degenerate quantum dipolar gases in optical lattices and the flexibility of experimental setups in attaining various geometries offer the opportunity to explore exotic quantum many-body phases stabilized by anisotropic, long-range dipolar interaction. Moreover, the unprecedented control over the various physical properties of these systems, ranging from the quantum statistics of the particles, to the inter-particle interactions, allow one to engineer novel devices. In this paper, we consider dipolar bosons trapped in a stack of one-dimensional optical lattice layers, previously studied in [1]. Building on our prior results, we provide a description of the quantum phases stabilized in this system which include composite superfluids, solids, and supercounterfluids, most of which are found to be threshold- less with respect to the dipolar interaction strength. We also demonstrate the effect of enhanced sensitivity to rotations of a SQUID-type device made of two composite superfluids trapped in a ring-shaped optical lattice layer with weak links.