Duality relations in single-file diffusion

Single-file transport, which corresponds to the diffusion of particles that cannot overtake each other in narrow channels, is an important topic out-of-equilibrium statistical physics. Various microscopic models single-file systems have been considered, such as simple exclusion process, has reached status a paradigmatic model. Several different shown be related by duality relation, holds either microscopically or only hydrodynamic limit large time and distances. Here, we show that, within framework fluctuating hydrodynamics, these relations are not specific limit, every system can mapped onto dual system, characterise. This general relation allows us obtain new results for models, exploiting solutions available their