Long-Range Coulomb Interaction and the Crossover between Quantum and Shot Noise in Diffusive Conductors

K. E. Nagaev

Published 1999-08-13, updated 2000-04-21Version 2

Frequency-dependent nonequilibrium noise in quantum-coherent diffusive conductors is calculated with account taken of long-range Coulomb interaction. For long and narrow contacts with strong external screening the crossover between quantum and shot noise takes place at frequencies much smaller than the voltage drop across the contact. We also show that under certain frequency limitations, the semiclassical and quantum-coherent approaches to shot noise are mathematically equivalent.