| Autor: |
Pedrozo-Peñafiel E; Instituto de Física de São Carlos, Universidade de São Paulo, São Paulo, Brasil., Paiva RR, Vivanco FJ, Bagnato VS, Farias KM |
| Jazyk: |
angličtina |
| Zdroj: |
Physical review letters [Phys Rev Lett] 2012 Jun 22; Vol. 108 (25), pp. 253004. Date of Electronic Publication: 2012 Jun 19. |
| DOI: |
10.1103/PhysRevLett.108.253004 |
| Abstrakt: |
Two-photon cooperative absorption is common in solid-state physics. In a sample of trapped cold atoms, this effect may open up new possibilities for the study of nonlinear effects. The experiment described herein starts with two colliding Na atoms in the S hyperfine ground state. The pair absorb two photons, resulting in both a P(1/2) and a P(3/2) atom. This excitation is observed by ionization using an external light source. A simple model that considers only dipole-dipole interactions between the atoms allows us to understand the basic features observed in the experimental results. Both the pair of generated atoms and the photons originating from their decay are correlated and may have interesting applications that remain to be explored. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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