252 citations · 2.2k across the 89 of their papers we have counts for
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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…
Quantum Phase Diagram of the Triangular-Lattice XXZ Model in a Magnetic Field
Daisuke Yamamoto, Giacomo Marmorini, Ippei Danshita
The triangular lattice of S=1/2 spins with XXZ anisotropy is a ubiquitous model for various frustrated systems in different contexts. We determine the quantum phase diagram of the…
First-order phase transition and anomalous hysteresis of Bose gases in optical lattices
Daisuke Yamamoto, Takeshi Ozaki, Carlos A. R. Sá de Melo +1
We study the first-order quantum phase transitions of Bose gases in optical lattices. A special emphasis is placed on an anomalous hysteresis behavior, in which the phase transitio…
Universal damping behavior of dipole oscillations of one-dimensional ultracold gases induced by quantum phase slips
Ippei Danshita
We study superflow decay via quantum phase slips in trapped one-dimensional (1D) quantum gases through dipole oscillations induced by sudden displacement of the trapping potential.…