Abstract
Consider two Fermi gases with the same average currents: a transport gas, as in solid-state experiments where the chemical potentials of terminal 1 is and of terminal 2 and 3 is , and a beam, i.e., electrons entering only from terminal 1 having energies between and . By expressing the current noise as a sum over single-particle transitions we show that the temporal current fluctuations are very different: The beam is noisier due to allowed single-particle transitions into empty states below . Surprisingly, the correlations between terminals 2 and 3 are the same.
- Received 26 February 2001
DOI:https://doi.org/10.1103/PhysRevLett.87.216807
©2001 American Physical Society