title: Local observation of antibunching in a trapped Fermi gas.
abstract: Local density fluctuations and density profiles of a Fermi gas are measured in situ and analyzed. In the quantum degenerate regime, the weakly interacting 6Li gas shows a suppression of the density fluctuations compared to the nondegenerate case, where atomic shot noise is observed. This manifestation of antibunching is a direct result of the Pauli principle and constitutes a local probe of quantum degeneracy. We analyze our data using the predictions of the fluctuation-dissipation theorem and the local density approximation, demonstrating a fluctuation-based temperature measurement.
authors.affiliation: Institute for Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland.
authors.forename: Torben
authors.initials: T
authors.lastname: Müller
authors.forename: Bruno
authors.initials: B
authors.lastname: Zimmermann
authors.forename: Jakob
authors.initials: J
authors.lastname: Meineke
authors.forename: Jean-Philippe
authors.initials: JP
authors.lastname: Brantut
authors.forename: Tilman
authors.initials: T
authors.lastname: Esslinger
authors.forename: Henning
authors.initials: H
authors.lastname: Moritz