- Abstract:
-
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...
Expand abstract - Publication status:
- Published
- Peer review status:
- Peer reviewed
- Version:
- Publisher's version
- Files:
-
-
(pdf, 2.7mb)
-
- Publisher copy:
- 10.1103/PhysRevApplied.5.034011
-
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- Publisher:
- American Physical Society Publisher's website
- Journal:
- Physical Review Applied Journal website
- Volume:
- 5
- Pages:
- 034011
- Publication date:
- 2016-03-05
- DOI:
- ISSN:
-
2331-7019
- URN:
-
uuid:650977d2-aa5d-465d-b60b-c6d906a5c804
- Source identifiers:
-
612122
- Local pid:
- pubs:612122
- Copyright holder:
- American Physical Society
- Copyright date:
- 2016
- Notes:
- © 2016 American Physical Society
Journal article
Sensitive radio-frequency measurements of a quantum dot by tuning to perfect impedance matching
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