Role of multilevel Rydberg interactions in electric-field-tuned Forster resonances

Autor(es)

Kondo, Jorge M. ; Booth, Donald ; Goncalves, Luis F. ; Shaffer, James P. ; Marcassa, Luis G.

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW A; v. 93, n. 1, p. 5-pg., 2016-01-08.

Resumo

In this work, we investigate the dc electric-field dependence of two Forster resonant processes in ultracold Rb-85, 37D(5/2) + 37D(5/2) -> 35L(L = O, Q) + 39P(3/2), as a function of the atomic density. At low densities, the 39P3/2 yield as a function of electric field exhibits resonances. With increasing density, the linewidths increase until the peaks merge. Even under these extreme conditions, where the Forster resonance processes show little electric-field dependence, the 39P(3/2) population depends quadratically on the total Rydberg atom population, suggesting that a two-body interaction is the dominant process. In order to explain our results, we implement a theoretical model which takes into account the multilevel character of the interactions and Rydberg atom blockade process using only atom pair interactions. The comparison between the experimental data and the model is very good, suggesting that the Forster resonant processes are dominated by two-body interactions up to atomic densities of 3.0 x 10(12) cm(-3). (AU)

• Processo FAPESP: 13/02816-8 - Manipulação de colisões atômicas em armadilhas ópticas
• Beneficiário: Luis Gustavo Marcassa
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 12/19342-6 - Interações anisotrópicas entre átomos de Rydberg ultrafrios e métodos de imagem
• Beneficiário: Luis Gustavo Marcassa
• Modalidade de apoio: Auxílio à Pesquisa - Regular