1993/11/19 by L. S. Levitov, G. B. Lesovik, Leonid Levitov · 6 citations
Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat
paper · pdf · doi:10.1103/physrevlett.72.538
published as Phys. Rev. Lett. 72, 538 (1994) · 10 pages, RevTeX 3.0, figures by request
arxiv created 1993/11/19 · openalex publication_date 1994/01/24 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study excess noise in a quantum conductor in the presence of constant voltage and alternating external field. Becasue of a two-particle interference effect caused by Fermi correlations the noise is sensitive to the phase of the time-dependent transmission amplitude. We compute spectral density and show that at T=0 the noise has singular dependence on the dc voltage V and the ac frequency \ensuremathΩ with cusplike singularities at integer eV/\ensuremath\Elzxh\ensuremathΩ. For a metallic loop with an alternating flux the phase sensitivity leads to an oscillating dependence of the strength of the cusps on the flux amplitude.