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Quantum Phases of Cold Polar Molecules in 2D Optical Lattices
- Source :
- Phys. Rev. Lett. 104, 125301 (2010)
- Publication Year :
- 2009
-
Abstract
- We discuss the quantum phases of hard-core bosons on a two-dimensional square lattice interacting via repulsive dipole-dipole interactions, as realizable with polar molecules trapped in optical lattices. In the limit of small tunneling, we find evidence for a devil's staircase, where solid phases appear at all rational fillings of the underlying lattice. For finite tunneling, we establish the existence of extended regions of parameters where the groundstate is a supersolid, obtained by doping the solids either with particles or vacancies. Here the solid-superfluid quantum melting transition consists of two consecutive second-order transitions, with a supersolid as the intermediate phase. The effects of finite temperature and confining potentials relevant to experiments are discussed.<br />Comment: replaced with published version
- Subjects :
- Condensed Matter - Statistical Mechanics
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Lett. 104, 125301 (2010)
- Publication Type :
- Report
- Accession number :
- edsarx.0906.2009
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.104.125301