Journal article
Sensitive radio-frequency measurements of a quantum dot by tuning to perfect impedance matching
- Abstract:
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Electrical readout of spin qubits requires fast and sensitive measurements, which are hindered by poor impedance matching to the device. We demonstrate perfect impedance matching in a radio-frequency readout circuit, using voltage-tunable varactors to cancel out parasitic capacitances. An optimized capacitance sensitivity of 1.6 aF/√Hz is achieved at a maximum source-drain bias of 170-μV rootmean-square and with a bandwidth of 18 MHz. Coulomb blockade in a quantum-dot is measured in...
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- Publication status:
- Published
- Peer review status:
- Peer reviewed
- Version:
- Publisher's version
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(pdf, 2.7MB)
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- Publisher copy:
- 10.1103/PhysRevApplied.5.034011
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Authors
Funding
Defence Science and Technology Laboratory
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European Union
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Royal Academy of Engineering
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Bibliographic Details
- Publisher:
- American Physical Society Publisher's website
- Journal:
- Physical Review Applied Journal website
- Volume:
- 5
- Pages:
- 034011
- Publication date:
- 2016-03-05
- DOI:
- ISSN:
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2331-7019
- URN:
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uuid:650977d2-aa5d-465d-b60b-c6d906a5c804
- Source identifiers:
-
612122
- Local pid:
- pubs:612122
Terms of use
- Copyright holder:
- American Physical Society
- Copyright date:
- 2016
- Notes:
- © 2016 American Physical Society
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