23rd International Laser Physics Workshop | |
Rydberg excitation of a Bose-Einstein condensate | |
Malossi, N.^1,2,3,4 ; Valado, M.M.^1,2 ; Arimondo, E.^1,2,3 ; Morsch, O.^1,2 ; Ciampini, D.^1,2,3 | |
Dipartimento di Fisica 'E. Fermi', Università di Pisa, Largo Pontecorvo 3, Pisa | |
56127, Italy^1 | |
INO-CNR, Via G. Moruzzi 1, Pisa | |
56124, Italy^2 | |
CNISM UdR Pisa, Dipartimento di Fisica 'E. Fermi', Università di Pisa, Largo Pontecorvo 3, Pisa | |
56127, Italy^3 | |
Scuola di Scienze e Tecnologie, Sezione di Fisica, Università di Camerino, I-62032 (MC), Italy^4 | |
关键词: Bimodal distribution; Bose-Einstein condensates; Bose-Einstein condensation phase transitions; Collective excitations; Rydberg excitation; Single ion counting; Spatial densities; Spatial dimension; | |
Others : https://iopscience.iop.org/article/10.1088/1742-6596/594/1/012041/pdf DOI : 10.1088/1742-6596/594/1/012041 |
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来源: IOP | |
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【 摘 要 】
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.
【 预 览 】
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Rydberg excitation of a Bose-Einstein condensate | 749KB | ![]() |