Pair-Supersolid Phase in a Bilayer System of Dipolar Lattice Bosons

Year: 2009

Authors: Trefzger C., Menotti C., Lewenstein M.

Autors Affiliation: ICFO Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona),Spain; CNR-INFM BEC and Dipartimento di Fisica, Universita\’ di Trento, I-38050 Povo, Italy; ICREA and ICFO Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain

Abstract: The competition between tunneling and interactions in bosonic lattice models generates a whole variety of different quantum phases. While, in the presence of a single species interacting via on site interaction, the phase diagram presents only superfluid or Mott insulating phases, for long-range interactions or multiple species, exotic phases such as supersolid or pair-superfluid appear. In this Letter, we show for the first time that the coexistence of effective multiple species and long-range interactions leads to the formation of a novel pair-supersolid phase, namely, a supersolid of composites. We propose a possible implementation with dipolar bosons in a bilayer two-dimensional optical lattice.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 103 (3)      Pages from: 035304  to: 035304

More Information: We acknowledge support of Spanish MEC (FIS200800784, QOIT), EU projects SCALA and NAMEQUAM, and ERC grant QUAGATUA. The authors thank O. Dutta, M. Modugno, L. Santos, S. Stringari, and B. Svistunov for interesting discussions.
DOI: 10.1103/PhysRevLett.103.035304

Citations: 77
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