2024/10/11 by Nathan Johnson, Gento Yamahata, Johnson, Nathan +3 · 1 citation
Engineering · Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum optics and atomic interactions #Semiconductor Lasers and Optical Devices #Semiconductor Quantum Structures and Devices
paper · pdf · doi:10.48550/arxiv.2410.08932
openalex publication_date 2024/10/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Dynamic quantum dots are known to generate very accurate currents and can be used as a source of single electron wavepackets for use in quantum metrology, sensing or information processing. To realise their full technological potential, it is desirable to maximise the 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 GHz frequencies, and this remains unexplained. Here, we present a novel analysis technique, combined with detailed modelling, to present a mechanism of high frequency breakdown in 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.