Noise as a tool for tracing effects of nonclassical correlations in a degenerate nonequilibrium electron gas

It is shown that nonclassical interelectron correlations modify the current fluctuation spectrum of a degenerate nonequilibrium macroscopic system: quantum correlations of occupancies of single-electron states are created by interelectron collisions under the Pauli constraints, presenting the electronic analog of Hanbury Brown and Twiss effect (correlation of intensities, not of phase). Calculation of the microwave electronic noise in a biased two- or three-dimensional degenerate channel, performed in quasiclassical approximation, demonstrates the modifications introduced by nonclassical correlations enabling one to trace the effect on the macroscopic level.