title: Atom interferometry with trapped fermi gases.
abstract: We realize an interferometer with an atomic Fermi gas trapped in an optical lattice under the influence of gravity. The single-particle interference between the eigenstates of the lattice results in macroscopic Bloch oscillations of the sample. The absence of interactions between fermions allows a time-resolved study of many periods of the oscillations, leading to a sensitive determination of the acceleration of gravity. The experiment proves the superiority of noninteracting fermions with respect to bosons for precision interferometry and offers a way for the measurement of forces with microscopic spatial resolution.
authors.affiliation: LENS and Dipartimento di Fisica, University of Florence, and INFM, Via Nello Carrara 1, 50019 Sesto Fiorentino, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Roati
authors.forename: E
authors.initials: E
authors.lastname: de Mirandes
authors.forename: F
authors.initials: F
authors.lastname: Ferlaino
authors.forename: H
authors.initials: H
authors.lastname: Ott
authors.forename: G
authors.initials: G
authors.lastname: Modugno
authors.forename: M
authors.initials: M
authors.lastname: Inguscio