Measurement of finite frequency noise cross-correlations with a resonant circuit

Details Measurement of finite frequency noise cross-correlations with a resonant circuit Measurement of finite frequency noise cross-correlations with a resonant circuit

2005-07-29

arxiv.org/abs/cond-mat/0507708v3

Physical Review B 74 (2006-09-25) 115323

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

The measurement of finite frequency noise cross-correlations represents an experimental challenge in mesoscopic physics. Here we propose a generalisation of the resonant LC circuit setup of Lesovik and Loosen which allow to probe directly such cross-correlations by measuring the charge fluctuations on the plates of a capacitor. The measuring circuit collects noise contributions at the resonant frequency of the LC circuit. Auto-correlation noise can be canceled out by switching the wires and making two distinct measurements. The measured cross-correlations then depend of four non-symmetrized correlators. This detection method is applied to a normal metal three terminal device. We subsequently discuss to what extent the measurement circuit can detect electron-antibunching and what singularities appear in the spectral density of noise cross-correlations.

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