We study a non-Hermitian symmetric generalization of an N-particle, two-mode Bose–
Hubbard system, modeling for example a Bose–Einstein condensate in a double well …

We investigate an N-particle Bose-Hubbard dimer with an additional effective decay term in
one of the sites. A mean-field approximation for this non-Hermitian many-particle system is …

We study Landau-Zener transitions in a qubit coupled to a bath at zero temperature. A
general formula that is applicable to models with a nondegenerate ground state is derived …

We investigate the tunneling dynamics of Bose-Einstein condensates (BECs) in a symmetric
as well as in a tilted triple-well trap within the framework of mean-field treatment. The …

We consider a quantum quench in which two initially independent condensates are
suddenly coupled and study the subsequent “rephasing” dynamics. For weak tunneling …

We investigate the Landau-Zener tunneling (LZT) of a self-interacting two-level system in
which the coupling between the levels is nonreciprocal. In such a non-Hermitian system …

We employ a semiclassical picture to study dynamics in a bosonic Josephson junction with
various initial conditions. Phase diffusion of coherent preparations in the Josephson regime …

The number-conserving quantum phase space description of the Bose-Hubbard model is
discussed for the illustrative case of two and three modes, as well as the generalization of …

The nonadiabatic quantum tunneling picture, which may be called the many-body
Schwinger-Landau-Zener mechanism, for the dielectric breakdown of Mott insulators in …

Adiabatic passage in systems of interacting bosons is substantially affected by interactions
and interparticle entanglement. We consider stimulated raman-adiabatic-passage-like …