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Quantum dots coupled to a GHz superconducting impedance matching circuit

Title
Quantum dots coupled to a GHz superconducting impedance matching circuit
Authors
Jung, Minkyung
DGIST Authors
Jung, Minkyung
Issue Date
2018-10-24
Citation
한국물리학회 2018년 가을학술논문발표회
Type
Conference
Abstract
In this work, we present carbon nanotube (CNT) single and double quantum dots coupled to a GHz superconducting impedance matching circuit using a CNT stamping technique. The device shows a tunable bipolar double dot behavior, reaching the few-electron/hole regime. The resonance response reflected by the matching circuit is a sensitive probe of the charge state of the device, allowing a determination of the absolute charge number. The resonance response at the interdot charge transitions enables quantitative parameter extraction. In addition, the impedance matching circuit allows excellent shot noise measurement performance in a carbon nanotube single quantum dot regime. The signal to noise ratio at a device resistance of 100 kΩ is enhanced by a factor of 3.5 compared to a wide-band detection without impedance matching.
URI
http://hdl.handle.net/20.500.11750/14703
Publisher
한국물리학회
Related Researcher
  • Author Jung, Minkyung Quantum Nanoelectronic Devices Lab
  • Research Interests nanoelectronics, quantum transport, quantum physics, qubit, condensed matter physics,
Files:
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Collection:
Division of NanotechnologyQuantum Nanoelectronic Devices Lab2. Conference Papers
Division of Nanotechnology2. Conference Papers


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