| Texto completo | |
| Autor(es): |
Kondo, Jorge M.
[1]
;
Goncalves, Luis F.
[1]
;
Cabral, Jader S.
[1]
;
Tallant, Jonathan
[1]
;
Marcassa, Luis G.
[1]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Paulo - Brazil
Número total de Afiliações: 1
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Physical Review A; v. 90, n. 2 AUG 18 2014. |
| Citações Web of Science: | 5 |
| Resumo | |
In this work, we excite nD(5/2) Rydberg states in a dense and cold Rb atomic sample held in a 10.6 mu m quasi-electrostatic trap using narrow-bandwidth laser pulses. Our goal is to study the Forster resonance process nD(5/2) + nD(5/2) -> (n - 2)F + (n + 2) P-3/2 at zero electric field as a function of the total atomic density using pulsed-field ionization in the range n = 37-47. Such a process is almost degenerate for n = 43. Younge and coworkers studied this process {[}K. C. Younge, A. Reinhard, T. Pohl, P. R. Berman, and G. Raithel, Phys. Rev. A 79, 043420 (2009)] and attributed the observed saturation to many-body effects. Our results show that as the ground-state atomic density increases, the nD(5/2) state population and the population transfer starts to saturate, which is consistent with the onset of Rydberg atom blockade and previously published results. However, since our experiment allows the independent measurement of the nD(5/2) and (n + 2)P-3/2 state populations, we were able to obtain the (n + 2) P-3/2 state population density dependence. Our results clearly show that the (n + 2)P-3/2 state population depends quadratically on the total Rydberg atomic population, and consequently, the Forster resonance is a two-body process for a ground-state atomic density below 3 x 10(11) cm(-3). (AU) | |
| Processo FAPESP: | 13/02816-8 - Manipulação de colisões atômicas em armadilhas ópticas |
| Beneficiário: | Luis Gustavo Marcassa |
| Linha de fomento: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 12/19342-6 - Interações anisotrópicas entre átomos de Rydberg ultrafrios e métodos de imagem |
| Beneficiário: | Luis Gustavo Marcassa |
| Linha de fomento: | Auxílio à Pesquisa - Regular |