Active control of THz plasmon propagation in a one-dimensional electronic waveguide
Abstract
Quantum nanoelectronics is pushing towards ever higher operating frequencies in order to realise quantum technologies capable of processing information at unprecedented speeds. A particularly promising direction is the development of flying electron qubits, which offer the prospect of quantum operations on picosecond timescales. Achieving in-flight quantum control in this regime would establish a fundamentally new paradigm for studying quantum entanglement and enable a novel form of quantum information processing based on propagating electronic wavepackets. Here we report a first step towards this goal by injecting ultrashort electron wavepackets into an engineered quantum nanoelectronic device. We demonstrate active control over the propagation speed of an electron wavepacket with a temporal duration as short as 4 ps in a quasi-one-dimensional electron waveguide with a length ranging from 10 μm to 40 μm. This advance provides a key building block for ultrafast quantum operations using flying electrons. Beyond its technological implications, our approach offers a platform for exploring the intrinsic dynamical processes that govern quantum transport and coherence in nanoscale electronic systems.
Related
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BibTeX
@misc{vasselon2026active,
title = {{Active control of THz plasmon propagation in a one-dimensional electronic waveguide}},
author = {Thomas Vasselon and Uzer Ahmad and Clément Geffroy and Lucas Mazzella and Matteo Aluffi and Seddik Ouacel and Jashwanth Shaju and Kevin Bredillet and Nathan Roussel and Jean-François Roux and Pierre-Baptiste Vigneron and Arne Ludwig and Andreas D. Wieck and Matias Urdampilleta and Hermann Sellier and Giorgos Georgiou and Christopher Bäuerle},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.28224},
eprint = {2609.28224},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.28224},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Active control of THz plasmon propagation in a one-dimensional electronic waveguide
AU - Thomas Vasselon
AU - Uzer Ahmad
AU - Clément Geffroy
AU - Lucas Mazzella
AU - Matteo Aluffi
AU - Seddik Ouacel
AU - Jashwanth Shaju
AU - Kevin Bredillet
AU - Nathan Roussel
AU - Jean-François Roux
AU - Pierre-Baptiste Vigneron
AU - Arne Ludwig
AU - Andreas D. Wieck
AU - Matias Urdampilleta
AU - Hermann Sellier
AU - Giorgos Georgiou
AU - Christopher Bäuerle
PY - 2026
DA - 2026/09/23
PB - arXiv
DO - 10.48550/arxiv.2609.28224
UR - https://arxiv.org/abs/2609.28224
AB - Quantum nanoelectronics is pushing towards ever higher operating frequencies in order to realise quantum technologies capable of processing information at unprecedented speeds. A particularly promising direction is the development of flying electron qubits, which offer the prospect of quantum operations on picosecond timescales. Achieving in-flight quantum control in this regime would establish a fundamentally new paradigm for studying quantum entanglement and enable a novel form of quantum information processing based on propagating electronic wavepackets. Here we report a first step towards this goal by injecting ultrashort electron wavepackets into an engineered quantum nanoelectronic device. We demonstrate active control over the propagation speed of an electron wavepacket with a temporal duration as short as 4 ps in a quasi-one-dimensional electron waveguide with a length ranging from 10 μm to 40 μm. This advance provides a key building block for ultrafast quantum operations using flying electrons. Beyond its technological implications, our approach offers a platform for exploring the intrinsic dynamical processes that govern quantum transport and coherence in nanoscale electronic systems.
ER -