A semiconductor single-atom micromaser consists of a microwave cavity coupled to a gain medium, a double quantum dot driven out of equilibrium by a bias voltage. The masing threshold of this system was recently probed by ...

We investigate the emergence and corresponding nature of exceptional points located on exceptional hypersurfaces of non-Hermitian transfer matrices for finite-range one-dimensional lattice models. We unravel the nontrivial ...

We study the quantum dynamics of filling an empty lattice of size L by connecting it locally with an equilibrium thermal bath that injects noninteracting bosons or fermions. We adopt four different approaches, namely, (i) ...