Phys. Rev. Lett. 93, 066805 (2004) [4 pages]Inductive Single-Electron TransistorReceived 22 December 2003; published 6 August 2004 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. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.066805
DOI:
10.1103/PhysRevLett.93.066805
PACS:
85.35.Gv, 73.23.Hk, 85.25.Cp
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