München 2004 – wissenschaftliches Programm

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Q: Quantenoptik und Photonik

Q 15: Quanteneffekte I

Q 15.2: Vortrag

Dienstag, 23. März 2004, 11:15–11:30, HS 218

Cooperative quantum jumps for three dipole-interacting atoms — •Volker Hannstein and Gerhard C. Hegerfeldt — Institut für Theoretische Physik, Universität Göttingen, Tammannstr. 1, 37077 Göttingen

We investigate the effect of the dipole-dipole interaction on the quantum jump statistics of three atoms. This is done for three-level systems in the V and in the D configuration. The transition rates between the four different intensity periods are calculated in closed form. Cooperative effects are shown to increase by a factor of two compared to two of either three-level systems. This results in transition rates that are, for distances of about one wavelength of the strong transition, up to 100 % higher than for independent systems. In addition, the double and triple jump rates are calculated from the transition rates. In this case the cooperative effects are even larger. Nevertheless, for the parameters of an experiment with Hg⁺ ions the effects are negligible, in agreement with the experimental data. This seems to indicate that the large cooperative effects observed experimentally for three Ba⁺ ions can not be explained by the dipole-dipole interaction.