- Conference date: 14–19 June 2009
- Location: Pisa (Italy)
We report on direct measurements of the electronic shot noise of a Quantum Point Contact (QPC) at frequencies ν in the range 4–8 GHz. The very small energy scale used ensures energy independent transmissions of the few transmitted electronic modes and their accurate knowledge. Both the thermal energy and the QPC drain‐source voltage are comparable to the photon energy leading to the observation of the shot noise suppression when The measurements provide the first direct comparison to the high frequency shot noise scattering theory without adjustable parameters. Furthermore, the developed method allows cross‐correlation measurements and computation of higher moments of current noise. This possibility is demonstrated by the measurements of the fluctuations of the power emitted by a biased tunnel junction.
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