EXPERIMENTAL INVESTIGATION OF THE PAULI EXCLUSION-PRINCIPLE USING NOISE IN COHERENT ELECTRON-TRANSPORT

We study low frequency noise and noise correlation in two kinds of mes oscopic conductors to investigate the contribution of Fermi statistics in coherent electron transport. In Y-shaped triple quantum point cont act structures, we observe multi-level switching noise which is much b igger than the expected contribution due to Fermi statistics. In a sec ond device structure, a partially transmitting surface gate is used to split ballistic electrons injected from a quantum point contact. In o ur noise measurements on these second kind of structures, within the r esolution of our noise measurement setup (10(-20) V-2/Hz), no excess n oise correlation between the reflection and transmission voltages is o bserved.