Ahmed, I;
Haigh, JA;
Schaal, S;
Barraud, S;
Zhu, Y;
Lee, CM;
Amado, M;
... Gonzalez-Zalba, MF; + view all
(2018)
Radio-Frequency Capacitive Gate-Based Sensing.
Physical Review Applied
, 10
(1)
, Article 014018. 10.1103/PhysRevApplied.10.014018.
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Abstract
Developing fast, accurate, and scalable techniques for quantum-state readout is an active area in semiconductor-based quantum computing. Here, we present results on dispersive sensing of silicon corner state quantum dots coupled to lumped-element electrical resonators via the gate. The gate capacitance of the quantum device is placed in parallel with a superconducting spiral inductor resulting in resonators with loaded Q factors in the 400-800 range. We utilize resonators operating at 330 and 616 MHz, and achieve charge sensitivities of 7.7 and 1.3μe/Hz, respectively. We perform a parametric study of the resonator to reveal its optimal operation points and perform a circuit analysis to determine the best resonator design. The results place gate-based sensing on a par with the best reported radio-frequency single-electron transistor sensitivities while providing a fast and compact method for quantum-state readout.
Type: | Article |
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Title: | Radio-Frequency Capacitive Gate-Based Sensing |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1103/PhysRevApplied.10.014018 |
Publisher version: | http://dx.doi.org/10.1103/PhysRevApplied.10.014018 |
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. / This work received funding from the European Union (EU)’s Horizon 2020 research and innovation programme H2020-ICT-2015 under grant agreement No 688539. |
Keywords: | Electronics, Quantum Information, Semiconductor Physics |
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/10053854 |
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