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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Two-body Forster resonance involving Rb nD states in a quasi-electrostatic trap

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Kondo, Jorge M. [1] ; Goncalves, Luis F. [1] ; Cabral, Jader S. [1] ; Tallant, Jonathan [1] ; Marcassa, Luis G. [1]
Total Authors: 5
[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Physical Review A; v. 90, n. 2 AUG 18 2014.
Web of Science Citations: 5

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)

FAPESP's process: 13/02816-8 - Manipulation of atomic collisions in optical traps
Grantee:Luis Gustavo Marcassa
Support type: Research Projects - Thematic Grants
FAPESP's process: 12/19342-6 - Anisotropic interactions between ultracold Rydberg atoms and Rydberg atom imaging methods
Grantee:Luis Gustavo Marcassa
Support type: Regular Research Grants