Scientific Results

Rydberg excitation of a Bose-Einstein condensate

Year: 2015

Authors: Malossi N., Valado M.M., Arimondo E., Morsch O., Ciampini D.

Autors Affiliation: Dipartimento di Fisica \”E. Fermi\”, Universita\’ di Pisa, Largo Pontecorvo 3, 56127 Pisa, Italy; INO-CNR, Via G. Moruzzi 1, 56124 Pisa, Italy; CNISM UdR Pisa, Dipartimento di Fisica \”E. Fermi\”, Universita\’ di Pisa, Largo Pontecorvo 3, 56127 Pisa, Italy

Abstract: The excitation to high-lying Rydberg states is investigated in a sample of 87-Rb atoms undergoing the Bose-Einstein condensation phase transition, in the limit that the spatial dimensions of the condensed cloud are smaller than the (Wan-der-Waals) dipole blockade radius. We measure the number of excitations by single ion counting as a function of the dimensions of the condensed and thermal fraction. We observed a distinct decrease in the number of excitations due to the change of the atomic spatial density distribution, from the thermal cloud, through a bimodal distribution, to the condensed cloud. When only the condensed part is present, the average number of excitations measured levels off at around one which is compatible with having a single collective excitation in the condensed cloud.

Journal/Review: JOURNAL OF PHYSICS. CONFERENCE SERIES

Volume: 594      Pages from: 012041  to: 012041

More Information: Conference: 23rd International Laser Physics Workshop (LPHYS)
Location: Bulgarian Acad Sci, Inst Elect, Sofia, BULGARIA
Date: JUL 14-18, 2014
Book Group Author(s): IOP
KeyWords: Atoms; Blockade; Rydberg states; Bose-Einstein condensate;
DOI: 10.1088/1742-6596/594/1/012041

Citations: 2
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