Frankfurt 2006 – wissenschaftliches Programm

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Q: Quantenoptik und Photonik

Q 16: Quanteneffekte II

Q 16.7: Vortrag

Montag, 13. März 2006, 18:30–18:45, HII

Simplified model for double jumps in dipole-dipole interacting atoms — •Volker Hannstein and Gerhard C. Hegerfeldt — Institut für Theoretische Physik, Universität Göttingen, Friedrich-Hund-Platz 1. 37077 Göttingen

A simplified scheme for the investigation of cooperative effects in the quantum jump statistics of small numbers of atoms in a trap is presented, which generalizes previous work [1,2,3]. It allows the analytic treatment of three dipole-interacting four-level systems which model the level scheme of Ba⁺ ions for which extremely high cooperative effects have been reported to be measured in experiments. Our theoretical result show effects of maximum 5% and practically no effects for experimental parameter values. As a consequence the dipole-dipole interaction can be ruled out as an explanation for the measured large effects for three Ba⁺ ions [4].

[1] C. Skornia et al. Europhys. Lett. 56, 665 (2001).

[2] V. Hannstein, G. C. Hegerfeldt, Phys. Rev. A 68, 043826 (2003).

[3] V. Hannstein, G. C. Hegerfeldt, Phys. Rev. A 70, 023820 (2004).

[4] T. Sauter et al. Opt Commun. 60, 287 (1986).