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Rydberg tomography of an ultra-cold atomic cloud

Valado, M. M. and Malossi, N. and Scotto, S. and Ciampini, D. and Arimondo, E. and Morsch, O. (2013) Rydberg tomography of an ultra-cold atomic cloud. Physical review. A, Atomic, Molecular, and Optical Physics . ISSN 1094-1622

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One of the most striking features of the strong interactions between Rydberg atoms is the dipole blockade effect, which allows only a single excitation to the Rydberg state within the volume of the blockade sphere. Here we present a method that spatially visualizes this phenomenon in an inhomogeneous gas of ultra-cold rubidium atoms. In our experiment we scan the position of one of the excitation lasers across the cold cloud and determine the number of Rydberg excitations detected as a function of position. Comparing this distribution to the one obtained for the number of ions created by a two-photon ionization process via the intermediate 5P level, we demonstrate that the blockade effect modifies the width of the Rydberg excitation profile. Furthermore, we study the dynamics of the Rydberg excitation and find that the timescale for the excitation depends on the atomic density at the beam position.

Item Type: Article
Additional Information: Imported from arXiv
Subjects: Area02 - Scienze fisiche > FIS/03 - Fisica della materia
Divisions: Dipartimenti (from 2013) > DIPARTIMENTO DI FISICA
Depositing User: dott.ssa Sandra Faita
Date Deposited: 07 Apr 2015 17:37
Last Modified: 07 Apr 2015 17:38
URI: http://eprints.adm.unipi.it/id/eprint/1373

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