Charge noise at Cooper-pair resonances
PISTOLESI, Fabio
Laboratoire de physique et modélisation des milieux condensés [LPM2C]
Centre de physique moléculaire optique et hertzienne [CPMOH]
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Laboratoire de physique et modélisation des milieux condensés [LPM2C]
Centre de physique moléculaire optique et hertzienne [CPMOH]
PISTOLESI, Fabio
Laboratoire de physique et modélisation des milieux condensés [LPM2C]
Centre de physique moléculaire optique et hertzienne [CPMOH]
< Reduce
Laboratoire de physique et modélisation des milieux condensés [LPM2C]
Centre de physique moléculaire optique et hertzienne [CPMOH]
Language
en
Article de revue
This item was published in
Physical Review B: Condensed Matter and Materials Physics (1998-2015). 2010-08-24, vol. 82, p. 064519 (11)
American Physical Society
English Abstract
We analyze the charge dynamics of a superconducting single-electron transistor (SSET) in the regime where charge transport occurs via Cooper-pair resonances. Using an approximate description of the system Hamiltonian, in ...Read more >
We analyze the charge dynamics of a superconducting single-electron transistor (SSET) in the regime where charge transport occurs via Cooper-pair resonances. Using an approximate description of the system Hamiltonian, in terms of a series of resonant doublets, we derive a Born-Markov master equation describing the dynamics of the SSET. The average current displays sharp peaks at the Cooper-pair resonances and we find that the charge noise spectrum has a characteristic structure which consists of a series of asymmetric triplets of peaks. The strongest feature in the charge noise spectrum is the triplet of peaks centered at zero frequency which has a peak spacing equal to the level separation within the doublets and is similar to the triplet in the spectrum of a driven, damped, two-level system. We also explore the back-action that the SSET charge noise would have on an oscillator coupled to the island charge, measurement of which provides a way of probing the charge noise spectrum.Read less <
English Keywords
superconducting single electron transistor
dissipative systems
ANR Project
NanoElectroMEchanical transport and Shuttling In normal and superconducting Systems - ANR-06-JCJC-0036
Origin
Hal imported