Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2006-02-08
Phys. Rev. B 73, 235343 (2006), Erratum: Phys. Rev. B 77, 049903 (2008)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages, 3 eps figures, corrected according to published Erratum
Scientific paper
10.1103/PhysRevB.73.235343
A double quantum dot charge detector, with one dot Coulomb coupled to the electron to be detected and the other modulated by a time-dependent plunger voltage, is analyzed in a minimal model. The signal and noise of the detector are calculated by a standard master equation and MacDonald formula technique. We find a dip in the noise spectrum at the double Rabi frequency of the double dot, defining the bandwidth available for detecting charges in motion.
Bernad Jozsef Zsolt
Geszti Tamas
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