In-flight detection of few electrons using a singlet-triplet spin qubit

We investigate experimentally the capacitive coupling between a two-electron singlet-triplet spin qubit and flying electrons propagating in quantum Hall edge channels. After calibration of the spin qubit detector, we assess its charge sensibility and demonstrate experimentally the detection of less...

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Bibliographic Details
Published in:	Physical review research Vol. 4; no. 4; p. 043116
Main Authors:	Thiney, Vivien, Mortemousque, Pierre-André, Rogdakis, Konstantinos, Thalineau, Romain, Ludwig, Arne, Wieck, Andreas D., Urdampilleta, Matias, Bäuerle, Christopher, Meunier, Tristan
Format:	Journal Article
Language:	English
Published:	American Physical Society 01-11-2022
Subjects:	Condensed Matter Physics
Online Access:	Get full text
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Summary:	We investigate experimentally the capacitive coupling between a two-electron singlet-triplet spin qubit and flying electrons propagating in quantum Hall edge channels. After calibration of the spin qubit detector, we assess its charge sensibility and demonstrate experimentally the detection of less than five flying electrons with average measurement. This experiment demonstrates that the spin qubit is an ultrasensitive and fast charge detector with the perspective of a future single shot-detection of a single flying electron. This work opens the route toward quantum electron optics experiments at the single electron level in semiconductor circuits.
ISSN:	2643-1564 2643-1564
DOI:	10.1103/PhysRevResearch.4.043116