2014/10/31 by Yoshihito Kuno, Y. Kuno, K. Suzuki +3
Mathematics · Physics and Astronomy · #Antiparallel (mathematics) #Boson #Checkerboard #Cold Atom Physics and Bose-Einstein Condensates #Component (thermodynamics) #Condensed matter physics #Dipole #Geometry #Lattice (music) #Mathematics #Monte Carlo method #Optical lattice #Phase (matter) #Phase diagram #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum Monte Carlo #Quantum mechanics #Quantum, superfluid, helium dynamics #Superfluidity #cond-mat.quant-gas #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physreva.90.063620
published as Phys. Rev. A 90, 063620 (2014) · 9 pages, 9 figures, Version to appear in Phys.Rev.A
arxiv created 2014/11/26 · openalex publication_date 2014/12/11 · arxiv updated 2014/12/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In this paper, we study an extended bosonic t-J model in an optical lattice, which describes two-component hard-core bosons with nearest-neighbor pseudospin interactions and, also, inter- and intraspecies dipole-dipole interactions. In particular, we focus on the case in which two-component hard-core bosons have antiparallel polarized dipoles with each other. The global phase diagram is studied by means of the Gutzwiller variational method and also quantum Monte Carlo (QMC) simulations. Both calculations show that a striped solid order, besides a checkerboard one, appears as a result of the dipole-dipole interactions. By QMC, we find that two kinds of supersolids (SSs) form, i.e., checkerboard SS and striped SS, and we also verify the existence of an exotic phase between the striped solid and the checkerboard SS. Finally, by QMC, we study the t-J-like model, which was recently realized experimentally by A. de Paz et al. [Phys. Rev. Lett. 111, 185305 (2013)].