Observation of coherence revival and fidelity saturation in a delta-kicked rotor potential

We experimentally investigate the effect of atomic \(\delta\)-kicked rotor potentials on the mutual coherence between wavepackets in an atom interferometer. The differential action of the kicked rotor degrades the mutual coherence, leading to a reduction of the interferometry fringe visibility; howe...

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Bibliographic Details
Published in:arXiv.org 2008-02
Main Authors: Wu, Saijun, Tonyushkin, Alexey, Prentiss, Mara G
Format: Article
Language:English
Subjects:
Saturation
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Summary:We experimentally investigate the effect of atomic \(\delta\)-kicked rotor potentials on the mutual coherence between wavepackets in an atom interferometer. The differential action of the kicked rotor degrades the mutual coherence, leading to a reduction of the interferometry fringe visibility; however, when the repetition rate of the kicked rotor is at or near the quantum resonance, we observe revival of matter-wave coherence as the number of kicks increases, resulting in non-vanishing coherence in the large kick number limit. This coherence saturation effect reflects a saturation of fidelity decay due to momentum displacements in deep quantum regime. The saturation effect is accompanied with an invariant distribution of matter-wave coherence under the kicked rotor perturbations.
ISSN:2331-8422
DOI:10.48550/arxiv.0801.0475