Noise in an SSET-resonator driven by an external field

Details Noise in an SSET-resonator driven by an external field Noise in an SSET-resonator driven by an external field

2008-07-29

arxiv.org/abs/0807.4612v1

Physical Review B, 78, 104302 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages. Accepted for PRB

Scientific paper

10.1103/PhysRevB.78.104302

We investigate the noise properties of a superconducting single electron transistor (SSET) coupled to an harmonically driven resonator. Using a Langevin equation approach, we calculate the frequency spectrum of the SSET charge and calculate its effect on the resonator field. We find that the heights of the peaks in the frequency spectra depend sensitively on the amplitude of the resonator oscillation and hence suggest that the heights of these peaks could act as a sensitive signal for detecting the small changes in the amplitude of the drive. The previously known results for the effective amplitude-dependent damping and temperature provided by the SSET for the case of a low frequency resonator are generalized for all resonator frequencies.

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