252 citations · 2.2k across the 89 of their papers we have counts for
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Accurate numerical verification of the instanton method for macroscopic quantum tunneling: dynamics of phase slips
Ippei Danshita, Anatoli Polkovnikov
Instanton methods, in which imaginary-time evolution gives the tunneling rate, have been widely used for studying quantum tunneling in various contexts. Nevertheless, how accurate…
Counterflow and paired superfluidity in one-dimensional Bose mixtures in optical lattices
Anzi Hu, L. Mathey, Ippei Danshita +3
We study the quantum phases of mixtures of ultra-cold bosonic atoms held in an optical lattice that confines motion or hopping to one spatial dimension. The phases are found by usi…
Quantum Many-Body Dynamics of Dark Solitons in Optical Lattices
R. V. Mishmash, I. Danshita, Charles W. Clark +1
We present a fully quantum many-body treatment of dark solitons formed by ultracold bosonic atoms in one-dimensional optical lattices. Using time-evolving block decimation to simul…
Instability of superfluid Fermi gases induced by a roton-like density mode in optical lattices
Yoshihiro Yunomae, Daisuke Yamamoto, Ippei Danshita +2
We study the stability of superfluid Fermi gases in deep optical lattices in the BCS--Bose-Einstein condensation (BEC) crossover at zero temperature. Within the tight-binding attra…