125 citations · 804 across the 71 of their papers we have counts for
11 papers · 1 filter
Experimental Determination of Bose-Hubbard Energies
Yusuke Nakamura, Yosuke Takasu, Jun Kobayashi +5
We present the first experimental measurement of the ensemble averages of both the kinetic and interaction energies of the three-dimensional Bose--Hubbard model at finite temperatu…
Theoretical Analysis on Spectroscopy of Atomic Bose-Hubbard Systems
Kensuke Inaba, Makoto Yamashita
We provide a numerical method to calculate comprehensively the microwave and the laser spectra of ultracold bosonic atoms in optical lattices at finite temperatures. Our formulatio…
Magnetism in the three-dimensional layered Lieb lattice: Enhanced transition temperature via flat-band and Van Hove singularities
Kazuto Noda, Kensuke Inaba, Makoto Yamashita
We describe the enhanced magnetic transition temperatures of two-component fermions in three-dimensional layered Lieb lattices, which are created in cold atom experiments. We…
Dynamical instability in the S=1 Bose-Hubbard model
Rui Asaoka, Hiroki Tsuchiura, Makoto Yamashita +1
We study the dynamical instabilities of superfluid flows in the S=1 Bose-Hubbard model. The time evolution of each spin component in a condensate is calculated based on the dynamic…
Density Modulations Associated with the Dynamical Instability in the Bose-Hubbard Model
Rui Asaoka, Hiroki Tsuchiura, Makoto Yamashita +1
A superfluid flow beyond a critical momentum in an optical lattice decays drastically by the interplay between nonlinearity due to the interparticle interactions in Bose-Einstein c…
Flat-band ferromagnetism in the multilayer Lieb optical lattice
Kazuto Noda, Kensuke Inaba, Makoto Yamashita
We theoretically study magnetic properties of two-component cold fermions in half-filled multilayer Lieb optical lattices, i.e., two, three, and several layers, using the dynamical…
Mott Transition and Spin Structures of Spin-1 Bosons in Two-Dimensional Optical Lattice at Unit Filling
Yuta Toga, Hiroki Tsuchiura, Makoto Yamashita +2
We study the ground state properties of spin-1 bosons in a two-dimensional optical lattice, by applying a variational Monte Carlo method to the S=1 Bose-Hubbard model on a square l…
Interaction and filling induced quantum phases of dual Mott insulators of bosons and fermions
Seiji Sugawa, Kensuke Inaba, Shintaro Taie +3
Many-body effects are at the very heart of diverse phenomena found in condensed-matter physics. One striking example is the Mott insulator phase where conductivity is suppressed as…
Time-of-flight imaging method to observe signatures of antiferromagnetically ordered states of fermionic atoms in an optical lattice
Kensuke Inaba, Makoto Yamashita
We propose a simple method to detect the antiferromagnetic (AF) state of fermionic atoms in an optical lattice by combining a time-of-flight (TOF) imaging method and a Feshbach res…
Thermodynamic properties of two-component fermionic atoms trapped in a two-dimensional optical lattice
Kensuke Inaba, Makoto Yamashita
We study the finite temperature properties of two-component fermionic atoms trapped in a two-dimensional optical lattice. We apply the self-energy functional approach to the two-di…
Nonadiabatic Dynamics of Ultracold Fermions in Optical Superlattices
Atsushi Yamamoto, Makoto Yamashita, Norio Kawakami
We study the time-dependent dynamical properties of two-component ultracold fermions in a one-dimensional optical superlattice by applying the adaptive time-dependent density matri…