Electric Field Effects in the Excitation of Cold Rydberg-Atom Pairs

Autor(es)

Nascimento, V. A. ^[1] ; Caliri, L. L. ^[1] ; Schwettmann, A. ^[2] ; Shaffer, J. P. ^[2] ; Marcassa, L. G. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Oklahoma, Homer L Dodge Dept Phys & Astron, Norman, OK 73019 - USA

• Tipo de documento: Artigo Científico
• Fonte: Physical Review Letters; v. 102, n. 21, p. 213201-1-213201-4, May 2009.
• Área do conhecimento: Ciências Exatas e da Terra - Física
• Citações Web of Science: 15
• Assunto(s): Espectroscopia óptica Átomos Rubídio

Resumo

In this work, we study the role of the ac Stark effects on the excitation of nS1/2 cold Rydberg atoms produced in a rubidium magneto-optical trap. We have observed an atomic population in the nP3/2 state after excitation of nS1/2 for 29<=n<=37. Such an observation is normally attributed to binary collisions; however, the interaction between Rb nS1/2 atoms is repulsive. To explain our results, the dipole-dipole interaction and ac Stark shifts from the excitation laser must be considered. We find that the Rydberg-atom-pair state asymptotically correlating to nP3/2+(n-1)P3/2 is excited directly. (AU)

• Processo FAPESP: 07/03758-0 - Gases bosônicos e fermiônicos em armadilhas ópticas
• Beneficiário: Luis Gustavo Marcassa
• Modalidade de apoio: Auxílio à Pesquisa - Regular