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Interaction Effects and Charge Quantization in Single-Particle Quantum Dot Emitters.

08:00 EDT 29th March 2019 | BioPortfolio

Summary of "Interaction Effects and Charge Quantization in Single-Particle Quantum Dot Emitters."

We discuss a theoretical model of an on-demand single-particle emitter that employs a quantum dot, attached to an integer or fractional quantum Hall edge state. Via an exact mapping of the model onto the spin-boson problem we show that Coulomb interactions between the dot and the chiral quantum Hall edge state, unavoidable in this setting, lead to a destruction of precise charge quantization in the emitted wave packet. Our findings cast doubt on the viability of this setup as a single-particle source of quantized charge pulses. We further show how to use a spin-boson master equation approach to explicitly calculate the current pulse shape in this setup.

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Journal Details

This article was published in the following journal.

Name: Physical review letters
ISSN: 1079-7114
Pages: 127701

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