Novel mechanism of supersolid of ultracold polar molecules in optical lattices

Takahiro Ohgoe*, Takafumi Suzuki, Naoki Kawashima


研究成果: Article査読

14 被引用数 (Scopus)


We study the checkerboard supersolid of the hard-core Bose-Hubbard model with the dipole-dipole interaction. This supersolid is different from all other supersolids found in lattice models in the sense that superflow paths through which interstitials or vacancies can hop freely are absent in the crystal. By focusing on repulsive interactions between interstitials, we reveal that the long-range tail of the dipole-dipole interaction has the role of increasing the energy cost of domain wall formations. This effect produces the supersolid by the second-order hopping process of defects. We also perform exact quantum Monte Carlo simulations and observe a novel double peak structure in the momentum distribution of bosons, which is clear evidence of a supersolid. This can be measured by the time-of-flight experiment in optical lattice systems.

ジャーナルjournal of the physical society of japan
出版ステータスPublished - 2011 11月 1

ASJC Scopus subject areas

  • 物理学および天文学(全般)


「Novel mechanism of supersolid of ultracold polar molecules in optical lattices」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。