Understanding superradiant phenomena with synthetic vector potentials in atomic Bose-Einstein condensates

We theoretically investigate superradiance effects in quantum field theories curved space-times by proposing an analog model based on Bose-Einstein condensates subject to a synthetic vector potential. The breaking of the irrotationality constraint superfluids allows us study simple planar geometries and obtain intuitive insight into amplified scattering processes at ergosurfaces. When boundary conditions are modified allow for reflections, dynamical instabilities found, similar ones ergoregions rotating space-times. Their stabilization horizons black hole is discussed. All these phenomena reinterpreted through exact mapping with physics one-dimensional relativistic charged scalar fields electrostatic potentials. Our provides deeper understanding basic mechanisms superradiance: By disentangling different ingredients play, it shines light some misconceptions role dissipation competition between superradiant instabilities.