Shot noise by quantum scattering in chaotic cavities

Abstract

The shot noise of open chaotic cavities defined by two quantum point contacts (QPCs) in series was experimentally studied. In the regime of noninteracting electrons, a Fano factor F = S/2e|I| of 1/4 was measured as theoretically predicted for symmetric cavities. Further, heating effects due to inelastic electron-electron scattering were determined by changing the opening of the contacts as well as the size of the cavity.