Manipulations cohérentes d'états de Rydberg elliptiques par dynamique Zénon quantique

Abstract : In this manuscript, we describe the realization of a new experimental setupto manipulate with a well-polarized radiofrequency electric field the internal state of aRydberg atom inside the Stark manifold. We used this setup to transfer with a nearly 1efficiency the atoms from a optically-accessible low-m state to the high angular momentumcircular Rydberg state. We then tried to induce new quantum dynamics of the atomicstate and we showed the quantum Zeno dynamics in a large Hilbert space. By applying awell-choose microwave field, one can restrict the atomic evolution induced by the radiofrequencyfield to a subspace of the Stark manifold. This confined dynamics is very differentfrom a classical dynamics. The system periodically evolves to a « Schrödinger cat state ».We experimentally observed this evolution in the phase space and mesured the atomicWigner function at the cat state . This is the first demonstration of the non-classicalaspect of the quantum Zeno dynamics in a non-trivial Hilbert space.
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Adrien Signoles. Manipulations cohérentes d'états de Rydberg elliptiques par dynamique Zénon quantique. Physique Quantique [quant-ph]. Université Pierre et Marie Curie - Paris VI, 2014. Français. ⟨NNT : 2014PA066614⟩. ⟨tel-01146049⟩

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