| Texto completo | |
| Autor(es): |
Goncalves, Luis Felipe
;
Marcassa, Luis Gustavo
Número total de Autores: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW A; v. 94, n. 4, p. 5-pg., 2016-10-28. |
| Resumo | |
Rydberg atoms possess a strong atom-atom interaction, which limits its density in an atomic sample. Such effect is known as a Rydberg-atom blockade. Here, we present a way to control such effect by directly orienting the induced atomic dipole moment using a dc external electrical field. To demonstrate it, we excite the 50S(1/2) Rb atomic state in a quasiunidimensional sample held in a quasielectrostatic trap. A pure nS state holds only van der Waals interaction at long range, but in the presence of an external electric field the state mixing leads to strong dipole-dipole interactions. We have measured the Rydberg-atom population as a function of ground-state atoms density for several angles between the electric field and the main axis of the unidimensional sample. The results indicate that the limit on the final Rydberg density can be controlled by electric-field orientation. Besides, we have characterized the sample by using a single-atom ion imaging technique, demonstrating that it does behave as a unidimensional sample. (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: | 11/22309-8 - Microestruturas com átomos de Rydberg frios |
| Beneficiário: | Luís Felipe Barbosa Faria Gonçalves |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |