Electron–hole quantum partition noise in a quantum point contact

Even when no bias voltage is applied to a quantum conductor, the electronic quantum partition noise can be investigated using giga hertz radiofrequency (RF) irradiation of a reservoir. Using a quantum point contact configuration we report an accurate determination of the partition noise Fano factor resulting from the photo-assisted shot noise. Applying both voltage bias and RF irradiation we are able to make a definitive quantitative test of the scattering theory of photo-assisted shot noise.