2 research outputs found
Density wave instabilities of tilted fermionic dipoles in a multilayer geometry
We consider the density wave instability of fermionic dipoles aligned by an
external field, and moving in equidistant layers at zero temperature. Using a
conserving Hartree-Fock approximation, we show that correlations between
dipoles in different layers significantly decrease the critical coupling
strength for the formation of density waves when the distance between the
layers is comparable to the inter-particle distance within each layer. This
effect, which is strongest when the dipoles are oriented perpendicular to the
planes, causes the density waves in neighboring layers to be in-phase for all
orientations of the dipoles. We furthermore demonstrate that the effects of the
interlayer interaction can be understood from a classical model. Finally, we
show that the interlayer correlations are important for experimentally relevant
dipolar molecules, including the chemically stable NaK and
KCs, where the density wave regime is within experimental reach.Comment: 18 pages, 11 figures; new version with expanded discussion on
experimental relevance including one new figur
Quantum Phases of Dipolar Bosons in Bilayer Geometry
We investigate the quantum phases of hard-core dipolar bosons confined to a
square lattice in a bilayer geometry. Using exact theoretical techniques, we
discuss the many-body effects resulting from pairing of particles across layers
at finite density, including a novel pair supersolid phase, superfluid and
solid phases. These results are of direct relevance to experiments with polar
molecules and atoms with large magnetic dipole moments trapped in optical
lattices.Comment: 7 pages, 5 figure