2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/103210We show that in clean chaotic cavities the power of shot noise takes a universal form. Our predictions go beyond previous results from random-matrix theory, in covering the experimentally relevant case of few channels. Following a semiclassical approach we evaluate the contributions of quadruplets of classical trajectories to shot noise. Our approach can be extended to a variety of transport phenomena as illustrated for the crossover between symmetry classes in the presence of a weak magnetic field.4 pages, 2 figuresMesoscale and Nanoscale PhysicsChaotic Dynamicstext