Photons transmitted through a medium of many radiators can show cooperative effects that go beyond simply adding up independent contributions. Using methods from quantum transport theory, this paper finds a cross-over in how the transmitted current scales with the number of radiators — from linear …

At sufficiently low reservoir temperatures, an open quantum system coupled weakly to its environment is known to relax toward its ground state. This paper looks at how fast that relaxation actually happens within the Born-Markov-secular approximation, where the system settles into a Gibbs state at …