Autor(es)

Magnani, Barbara ; Mojica-Casique, Cristian ; Marcassa, Luis Gustavo

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS; v. 53, n. 6, p. 5-pg., 2020-03-28.

Resumo

In this work, we present lifetime measurements of nS states of Rb as a function of the principal quantum number (40 <= n <= 70) using a sample of cold atoms held in a magneto-optical trap, which is performed in a finite size metal vacuum chamber. The Rydberg states are excited through a two-photon transition, and detected by pulsed field ionization. Our measurements are larger than the predictions by well established theoretical model (1984 Phys. Rev. A 30 2881 and 2009 Phys. Rev. A 79 052504). We have implemented a theoretical model, which considers the vacuum chamber as a lossy Fabry-Perot cavity with a discrete spectrum, and compared with experimental results. Such comparison indicates that the blackbody radiation contribution on Rydberg state lifetime can be decreased by using a small size metal cavity, without the need of cryogenic environment. This effect may have application in experiments where longer Rydberg lifetimes are required. (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: 16/21311-2 - Átomos de Rydberg frios: efeitos de poucos corpos e interações de alta ordem
• Beneficiário: Bárbara da Fonseca Magnani
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado