Darmstadt 2008 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 36: Quanteninformation (Konzepte und Methoden II)
Q 36.6: Vortrag
Donnerstag, 13. März 2008, 12:15–12:30, 1B
Characterization of superposition states via STIRAP-type back transfer — •Ruth Garcia-Fernandez1,2, Frank Vewinger1,3, David Dzsotjan1, and Klaas Bergmann1 — 1FB Physik, TU Kaiserslautern, Kaiserslautern — 2Current address: Institut für Physik, Johannes-Gutenberg Universität, Mainz — 3Current address: Institut für Angewandte Physik, Universität Bonn, Bonn
We present results of an experimental technique for the characterization of coherent superposition states between magnetic sublevels. The technique is based on a multistate variant of the stimulated Raman adiabatic passage (STIRAP) method [1]. The determination of the parameters of the superposition (phases and amplitudes) is achieved using the reverse process, i.e., the transfer of the population in the superposition state back to the initial state by means of a second interaction zone with the laser beams. The experiments are carried out in a collimated supersonic beam of Neon atoms. The superposition states involves two or more degenerate levels in the J = 2 metastable state. The population in the initial state J = 0 is monitored as a function of the phase. The parameters of the unknown initial superposition state are determined from the properties of the laser radiation which lead to a maximum flow of atoms in J = 0.
[1] F. Vewinger et al., Phys. Rev. A 75, 043407, 2007.