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. 
Arghavan Safavi-Naini, Sebnem G. Soyler, Guido Pupillo, H. R.   Sadeghpour, Barbara Capogrosso-Sansone
cond-mat.quant-gas quant-ph