2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/99285We present a novel derivation of the original Levitov formula, for the statistics of charge transported between electron reservoirs. This is done by proving a trace formula, which relates certain traces in Fock space to single particle determinants. Using the present approach we find in addition several generalizations, such as a corresponding formula for Bosons.Contribution to "Quantum Noise", edited by Yu. V. Nazarov and Ya. M. Blanter (Kluwer)Mesoscale and Nanoscale PhysicsStatistical MechanicsQuantum Physicstext