Berlin 2005 – scientific programme

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Q: Quantenoptik und Photonik

Q 21: Poster Quanteneffekte

Q 21.4: Poster

Monday, March 7, 2005, 11:00–12:30, Poster HU

Phase Control by Frequency Control within superposition states of multiple degenerate sublevels — •Manfred Heinz, Frank Vewinger, Christian Barthel und Klaas Bergmann — FB Physik, TU Kaiserslautern, 67663 Kaiserslautern

We demonstrate a method for the preparation and manipulation of superposition states of more than two degenerate levels in a robust and efficient way. We also report on the measurement of the relative phase between two levels. The experiments are performed on levels in neon. For the preparation process we use extended Tripod-STIRAP which is a variant of the well known STIRAP method [1]. The extended tripod system allows the preparation of superposition states of three or five magnetic sublevels depending on the detuning from the two-photon resonance. The relative phase between the m=−2 and m=0 state is determined by the relative phase of the Stokes laser fields. It will also be shown that coherent superpositions can be prepared when the laser frequencies are tuned off two-photon resonance. The explicit form of the superposition state then depends on the detuning.

[1] B.W. Shore et al. Advances of Atomic, Molecular and Optical Physics, 46:55-190, 2003