Year: 1997
Type: article
Abstract: We investigate the correlations in the current fluctuations at different terminals of metallic diffusive conductors. We start from scattering matrix expressions for the shot noise and use the Fisher-Lee relation in combination with diagram technique to evaluate the noise correlations. Of particular interest are exchange (interference) effects analogous to the Hanbury Brown--Twiss effect in optics. We find that the exchange effect exists in the ensemble-averaged current correlations. Depending on the geometry, it might have the same magnitude as the mean-square current fluctuations of the shot noise. The approach that we use is also applied to present a different derivation of the $1/3$ suppression of shot noise in a two-terminal geometry, which is valid for an arbitrary relation between the length and wire width. We find that in all geometries correlations are insensitive to dephasing.
Authors: Ya. M. Blanter, M. Büttiker
Institution: University of Geneva
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1987304249