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arXiv 2006-02-08 DOI 10.1103/PhysRevB.73.235343 0 views

Theory of a double-dot charge detector

Geszti, Tamas · Bernad, Jozsef Zsolt

Original · EN

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.

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