Duality in quantum transport models

We develop the `duality approach', that has been extensively studied for classical models of transport, quantum systems in contact with a thermal `Lindbladian' bath. The method provides (a) mapping original model to simpler one, containing only few particles and (b) shows any dynamic process this kind generic baths may be mapped onto one equilibrium baths. exemplify through study particular model: symmetric exclusion introduced [1]. As case, whole construction becomes intelligible by considering dynamical symmetries problem.