Unveiling the bosonic nature of an ultrashort few-electron pulse

Gregoire Roussely, Everton Arrighi, Giorgos Georgiou, Shintaro Takada, Martin Schalk, Matias Urdampilleta, Arne Ludwig, Andreas D. Wieck, Pacome Armagnat, Thomas Kloss, Xavier Waintal, Tristan Meunier and Christopher Bäuerle ()
Additional contact information
Gregoire Roussely: Institut Néel
Everton Arrighi: Institut Néel
Giorgos Georgiou: Institut Néel
Shintaro Takada: Institut Néel
Martin Schalk: Institut Néel
Matias Urdampilleta: Institut Néel
Arne Ludwig: Ruhr-Universität Bochum
Andreas D. Wieck: Ruhr-Universität Bochum
Pacome Armagnat: INAC-Pheliqs
Thomas Kloss: INAC-Pheliqs
Xavier Waintal: INAC-Pheliqs
Tristan Meunier: Institut Néel
Christopher Bäuerle: Institut Néel

Nature Communications, 2018, vol. 9, issue 1, 1-6

Abstract: Abstract Quantum dynamics is very sensitive to dimensionality. While two-dimensional electronic systems form Fermi liquids, one-dimensional systems—Tomonaga–Luttinger liquids—are described by purely bosonic excitations, even though they are initially made of fermions. With the advent of coherent single-electron sources, the quantum dynamics of such a liquid is now accessible at the single-electron level. Here, we report on time-of-flight measurements of ultrashort few-electron charge pulses injected into a quasi one-dimensional quantum conductor. By changing the confinement potential we can tune the system from the one-dimensional Tomonaga–Luttinger liquid limit to the multi-channel Fermi liquid and show that the plasmon velocity can be varied over almost an order of magnitude. These results are in quantitative agreement with a parameter-free theory and demonstrate a powerful probe for directly investigating real-time dynamics of fractionalisation phenomena in low-dimensional conductors.

Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05203-7

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DOI: 10.1038/s41467-018-05203-7

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