Inductive Single-Electron Transistor

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2004
Department
Teknillisen fysiikan laitos
Department of Applied Physics
Major/Subject
Mcode
Degree programme
Language
en
Pages
066805/1-4
Series
Physical Review Letters, Volume 93, Issue 6
Abstract
We demonstrate a sensitive method of charge detection based on radio-frequency readout of the Josephson inductance of a superconducting single-electron transistor. Charge sensitivity 1.4×10−4   e/√Hz, limited by a preamplifier, is achieved in an operation mode which takes advantage of the nonlinearity of the Josephson potential. Owing to reactive readout, our setup has more than 2 orders of magnitude lower dissipation than the existing method of radio-frequency electrometry. With an optimized sample, we expect uncoupled energy sensitivity below ℏ in the same experimental scheme.
Description
Keywords
single-electron transistors, mesoscopic detectors, radio-frequencies, quantum measurements, Cooper pair tunneling, Josephson effect
Other note
Citation
Sillanpää, Mika A. & Roschier, Leif & Hakonen, Pertti J. 2004. Inductive Single-Electron Transistor. Physical Review Letters. Volume 93, Issue 6. 066805/1-4. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.93.066805.