Johnson, Nathan;
Yamahata, Gento;
Fujiwara, Akira;
(2025)
High-frequency breakdown in dynamic tunable-barrier quantum dots.
Physical Review Applied
, 24
(6)
, Article 064045. 10.1103/1mtz-rkqp.
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Abstract
Tunable-barrier dynamic quantum dots are known to generate very accurate single-electron-based currents and can be used as a source of single-electron wave packets for use in quantum metrology, sensing, or information processing. To realize their full technological potential, it is desirable to maximize their frequency of operation to increase the current; however, it has been observed that the mechanism of electron transfer across the quantum dot consistently breaks down for gigahertz frequencies, and this remains unexplained. Here, we present an analysis technique, combined with detailed modeling, to present a mechanism of high-frequency breakdown in this class of quantum dots as a rapidly imparted momentum impulse. Such understanding aids future design and operation protocols, allowing their use in high-frequency and real-time quantum measurements and technologies.
| Type: | Article |
|---|---|
| Title: | High-frequency breakdown in dynamic tunable-barrier quantum dots |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/1mtz-rkqp |
| Publisher version: | https://doi.org/10.1103/1mtz-rkqp |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10219193 |
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