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Atom Interferometry with Trapped Fermi Gases

2004; American Physical Society; Volume: 92; Issue: 23 Linguagem: Inglês

10.1103/physrevlett.92.230402

1092-0145

G. Roati, E. de Mirandes, Francesca Ferlaino, Herwig Ott, Giovanni Carlo Modugno, M. Inguscio,

Quantum Information and Cryptography

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.