Enhanced shot noise in asymmetric interacting two level systems

Abstract

We study a model of two interacting levels that are attached to two electronic leads, where one of the levels is attached very weakly to the leads. We use rate equations method to calculate the average current and the noise of electrons transmitted through the two levels. We show that the shot noise is enhanced due to the interactions and that the Fano factor depends on the properties of the couplings between the levels and the leads. We study both sequential tunneling and cotunneling processes and show that there is a range of parameters in which the cotunneling processes affect the noise significantly, even though most of the current is carried by sequential tunneling processes.

Published version

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Cited by in corpus (12)

• Full counting statistics and shot noise of cotunneling in quantum dots and single-molecule transistors
• Current Noise in Single-Molecule Junctions Induced by Electronic-Vibrational Coupling
• Counting quantum jumps: a summary and comparison of fixed-time and fluctuating-time statistics in electron transport
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• Distribution of waiting times between electron cotunnelings
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• Molecule-assisted ferromagnetic atomic chain formation
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• Electron-pairing in the quantum Hall regime due to neutralon exchange
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