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Cavity quantum electrodynamics - Laboratoire Kastler Brossel

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Accueil du site > Puces à atome cryogéniques > Piège électrodynamique pour état de Rydberg > Comment charger un et un seul atome

Comment charger un et un seul atome

For many quantum information processing experiments, the deterministic preparation and storage of an individual qubit is a critical requirement. In previous experiments with circular Rydberg atoms, we expressly set the rate of excitation extremely low in order to be able to neglect two-atom events. This is, of course, at the expense of very long data acquisition times. We propose here to deterministically load the trap with a single Rydberg atom by using the dipole-blockade effect.

Le blocage dipolaire

The essential idea behind this phenomenon is that level shifts due to the dipole-dipole interaction make the laser nonresonant for the excitation of more than one Rydberg atom.

Chargement à partir d’un piége supraconducteur

Atom-chip traps can fulfill all the conditions required by our proposal. They allow for very high densities of ground-state atoms in trap volumes as small as a few $\mu$ m $^3$ . Morevover, they can, by construction, store atoms close to surfaces