  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.
