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Article Dans Une Revue Physical Review A : Atomic, molecular, and optical physics [1990-2015] Année : 2015

Contrast decay in a trapped-atom interferometer

Résumé

A Ramsey-Raman interferometer is used to realize a compact force sensor using cold 87Rb atoms trapped in a vertical optical lattice. The sensitivity and accuracy of the force measurements are discussed and the limits in short-term sensitivity evaluated. We reach a relative sensitivity on the Bloch frequency and thus on the gravity acceleration of 3.9 ×10-6 at 1 s. We perform an experimental study of the influence of the transverse confinement onto the decay of the interferometer contrast and compare the measurements with a simple semiclassical model. It is shown that vertical gradients of the trapping potential can contribute significantly to the loss of contrast.
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Dates et versions

hal-02448890 , version 1 (22-01-2020)

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A. Hilico, C. Solaro, M.-K. Zhou, M. Lopez, F. Pereira dos Santos. Contrast decay in a trapped-atom interferometer. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2015, 91 (5), pp.053616. ⟨10.1103/PhysRevA.91.053616⟩. ⟨hal-02448890⟩
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