11 papers
Stability of current-carrying states in hard-core bosons with long-range hopping on a square lattice
Yoshihiro Yabuuchi, Ippei Danshita
We investigate the stability of current-carrying states with quasi-momentum in the Bose-condensed phase of the hard-core Bose-Hubbard model on a square lattice, where particles…
Entanglement-enhanced correlation propagation in the one-dimensional SU() Fermi-Hubbard model
Mathias Mikkelsen, Ippei Danshita
We investigate the dynamics of correlation propagation in the one-dimensional Fermi-Hubbard model with SU() symmetry when the repulsive-interaction strength is quenched from a l…
Higgs and Nambu-Goldstone modes in a spin-1 model with long-range interactions
Daiki Kawasaki, Ippei Danshita
We theoretically study the collective excitations in a spin-1 model with a quadratic Zeeman term and a long-range interaction that decays algebraically with the distance. Usin…
Suppressed correlation-spreading in a one-dimensional Bose-Hubbard model with strong interactions
Jose Carlos Pelayo, Ippei Danshita
We investigate signatures of non-ergodic behavior in the real-time evolution of a one-dimensional Bose-Hubbard model, where the initial state is a doubly occupied density-wave stat…
Observation of anomalous tunneling in collective excitations via a cloud experiment platform for Bose-Einstein condensates
Daichi Kagamihara, Hironori Kazuta, Yewei Wu +2
Recent development of cloud-based experiment platforms has enabled physicists to examine theoretical concepts with unprecedented accessibility. Oqtant is a cloud-accessible platfor…
Observation of slow relaxation due to Hilbert space fragmentation in strongly interacting Bose-Hubbard chains
Kantaro Honda, Yosuke Takasu, Shimpei Goto +4
While isolated quantum systems generally thermalize after long-time evolution, there are several exceptions defying thermalization. A notable mechanism of such nonergodicity is the…