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5 papers · 2 filters
Persistent-current states originating from the Hilbert space fragmentation in momentum space
Masaya Kunimi, Ippei Danshita
Hilbert space fragmentation (HSF) is a phenomenon that the Hilbert space of an isolated quantum system splits into exponentially many disconnected subsectors. The fragmented system…
Kelvin wave in miscible two-component Bose-Einstein condensates
Kenichi Kasamatsu, Maki Okada, Hiromitsu Takeuchi
We study the dispersion of Kelvin waves propagating along single- and half-quantum vortices in miscible two-component Bose-Einstein condensates based on the analysis of the Bogolou…
Evolution of entanglement entropy in strongly correlated bosons in an optical lattice
Shion Yamashika, Daichi Kagamihara, Ryosuke Yoshii +1
We investigate the time evolution of the second-order Rényi entropy (RE) for bosons in a one-dimensional optical lattice following a sudden quench of the hopping amplitude . Spe…
Isothermal compressibility and effects of multi-body molecular interactions in a strongly interacting ultracold Fermi gas
Daichi Kagamihara, Ryohei Sato, Koki Manabe +2
We theoretically investigate the isothermal compressibility in the normal state of an ultracold Fermi gas. Including pairing fluctuations, as well as preformed-pair formati…
Resonant superfluidity in the Rabi-coupled spin-dependent Fermi-Hubbard model
Mathias Mikkelsen, Ryui Kaneko, Daichi Kagamihara +1
We investigate the ground-state phase diagram of the one-dimensional attractive Fermi-Hubbard model with spin-dependent hoppings and an on-site Rabi coupling using the density matr…