224 citations · 2.2k across the 82 of their papers we have counts for
6 papers · 1 filter
Cubic-quintic nonlinearity in superfluid Bose-Bose mixtures in optical lattices: Heavy solitary waves, barrier-induced criticality, and current-phase relations
Ippei Danshita, Daisuke Yamamoto, Yasuyuki Kato
We study superfluid (SF) states of strongly interacting Bose-Bose mixtures with equal mass and intra-component interaction in optical lattices both in the presence and absence of a…
Quantum tricriticality at the superfluid-insulator transition of binary Bose mixtures
Yasuyuki Kato, Daisuke Yamamoto, Ippei Danshita
Quantum criticality near a tricritical point (TCP) is studied in the two-component Bose-Hubbard model on square lattices. The existence of quantum TCP on a boundary of superfluid-i…
Probing Phases and Quantum Criticality using Deviations from the Local Fluctuation-Dissipation Theorem
E. Duchon, Y. Kato, N. Trivedi
Introduction Cold atomic gases in optical lattices are emerging as excellent laboratories for testing models of strongly interacting particles in condensed matter physics. Currentl…
Novel Polaron State for Single Impurity in a Bosonic Mott Insulator
Yasuyuki Kato, K. A. Al-Hassanieh, A. E. Feiguin +2
We show that a single impurity embedded in a cold atom bosonic Mott insulator leads to a novel polaron that exhibits correlated motion with an effective mass and a linear size that…
Finite temperature study of bosons in a two dimensional optical lattice
K. W. Mahmud, E. N. Duchon, Y. Kato +3
We use quantum Monte Carlo (QMC) simulations to study the combined effects of harmonic confinement and temperature for bosons in a two dimensional optical lattice. The scale invari…
Reponse to Comment on "Direct mapping of the finite temperature phase diagram of strongly correlated quantum models"
Qi Zhou, Yasuyuki Kato, Naoki Kawashima +1
Pollet et al have questioned our claim staked in Phys. Rev. Lett. 103, 085701 (2009) that from the location of sharp features in the compressibility in the trap, it is possible to…