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arXiv · cond-mat/9905283

Double Quantum Dots as Detectors of High-Frequency Quantum Noise in Mesoscopic Conductors

Ramon Aguado·Leo P. Kouwenhoven
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Abstract

We propose a measurement set-up for detecting quantum noise over a wide frequency range using inelastic transitions in a tunable two-level system as a detector. The frequency-resolving detector consists of a double quantum dot which is capacitively coupled to the leads of a nearby mesoscopic conductor. The inelastic current through the double quantum dot is calculated in response to equilibrium and non-equilibrium current fluctuations in the nearby conductor, including vacuum fluctuations at very low temperatures. As a specific example, the fluctuations across a quantum point contact are discussed.

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Ramon Aguado, Leo P. Kouwenhoven. 1999-12-03. Double Quantum Dots as Detectors of High-Frequency Quantum Noise in Mesoscopic Conductors. https://doi.org/10.1103/physrevlett.84.1986

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