Contrast decay in a trapped-atom interferometer

Contrast decay in a trapped-atom interferometer

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 f...

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Veröffentlicht in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2015-05, Vol.91 (5), Article 053616
Hauptverfasser: Hilico, A., Solaro, C., Zhou, M.-K., Lopez, M., Pereira dos Santos, F.
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Sciences of the Universe
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container_title Physical review. A, Atomic, molecular, and optical physics
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creator Hilico, A.
Solaro, C.
Zhou, M.-K.
Lopez, M.
Pereira dos Santos, F.
description 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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title Contrast decay in a trapped-atom interferometer
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