26TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT26), PTS 1-5 400 2012年 [査読有り]
We study the checkerboard supersolid of hard-core bosonic polar molecules in a 2D square lattice. This supersolid shows a novel double-peak structure in the momentum distribution of bosons. The double peaks indicate coexistence of superfluidity an...
Physical Review B - Condensed Matter and Materials Physics 84(18) 2011年11月 [査読有り]
We consider spin-1 Haldane chains with single-ion anisotropy, which exists in known Haldane chain materials. We develop a perturbation theory in terms of anisotropy, where the magnon-magnon interaction is important even in the low-temperature limi...
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 80(11) 113001 2011年11月 [査読有り]
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 interstiti...
We consider spin-1 Haldane chains with single-ion anisotropy, which exists in known Haldane chain materials. We develop a perturbation theory in terms of anisotropy, where the magnon-magnon interaction is important even in the low-temperature limi...
INTERNATIONAL CONFERENCE ON FRUSTRATION IN CONDENSED MATTER (ICFCM) 320 2011年 [査読有り]
We study the finite-temperature transition to the 1/2 magnetization plateau in a model of interacting S = 1/2 spins with longer range interactions and strong exchange anisotropy on the geometrically frustrated Shastry-Sutherland lattice. In previo...
A numerical algorithm to calculate exact finite-temperature spectra of<br />
many-body lattice Hamiltonians is formulated by combining the typicality<br />
approach and the shifted Krylov subspace method. The combined algorithm, which<br />
we nam...
Takafumi Suzuki   Masahiro Sato   
2015年5月
We study the boundary nature of trapped bosonic Mott insulators in optical<br />
square lattices, by performing quantum Monte Carlo simulation. We show that a<br />
finite superfluid density generally emerges in the incommensurate-filling (IC)<br ...