Quantum noise in resonant tunnelling

Abstract

A master equation method is used to describe current noise in resonant tunnelling diodes which contain a single bound state in the well. The state is below the Fermi level of the emitter and coupled to two electron reservoirs by quantum tunnelling through the two barriers. The two-time correlation function for the classical current in the device is calculated in terms of the fundamental quantum stochastic processes in the well. The results reproduce those previously obtained by a nonequilibrium Green's function approach. The model shows that the quantum Markov treatment may be applied to mesoscopic electronic systems with more succinct formalism.