Mesoscopic threshold detectors: Telegraphing the size of a fluctuation

Andrew N. Jordan and Eugene V. Sukhorukov
Phys. Rev. B 72, 035335 – Published 15 July 2005

Abstract

We propose a two-terminal method to measure shot noise in mesoscopic systems based on an instability in the current-voltage characteristic of an on-chip detector. The microscopic noise drives the instability, which leads to random switching of the current between two values, the telegraph process. In the Gaussian regime, the shot noise power driving the instability may be extracted from the IV curve, with the noise power as a fitting parameter. In the threshold regime, the extreme value statistics of the mesoscopic conductor can be extracted from the switching rates, which reorganize the complete information about the current statistics in an indirect way, “telegraphing” the size of a fluctuation. We propose the use of a quantum double dot as a mesoscopic threshold detector.

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  • Received 1 April 2005

DOI:https://doi.org/10.1103/PhysRevB.72.035335

©2005 American Physical Society

Authors & Affiliations

Andrew N. Jordan and Eugene V. Sukhorukov

  • Département de Physique Théorique, Université de Genève, CH-1211 Genève 4, Switzerland

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Issue

Vol. 72, Iss. 3 — 15 July 2005

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