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Q: Quantenoptik und Photonik

Q 29: Poster Quanteneffekte

Q 29.6: Poster

Dienstag, 14. März 2006, 16:30–18:30, Labsaal

Efficient coherent population transfer induced by retroreflection-induced bichromatic adiabatic passage — •Alvaro Peralta Conde¹, Leonid P. Yatsenko², Jens Klein¹, Martin Oberst¹, and Thomas Halfmann¹ — ¹Department of Physics, University of Kaiserslautern, Erwin Schroedinger-Strasse, 67653 Kaiserslautern Germany — ²Institute of Physics, National Academy of Sciences of Ukraine, Prospect Nauki 46, 03650, Ukraine

We present a simple technique that produces a complete adiabatic passage between two atomic or molecular bound states without the need for frequency-chirped lasers or varying Starks shifts. In this technique a single laser beam intersects twice, e.g. by retroreflection, a supersonic particle beam slightly tilted away from normal incidence, thereby inducing Doppler shifts of the atomic resonance between the initial and target state. The retroreflected beam should be parallel to the incident beam, attenuated and sligthly delayed. Under these conditions, it can be shown [1] that complete and robust population transfer between two quantum states can be achieved. Experimental results have been obtained in metastable Helium [2]. The experimental data are compared to numerical simulation.

[1] L.P. Yatsenko, B.W. Shore N. V. Vitanov and K. Bergmann Phys. Rev. A 68, 043405, (2003).

[2] A. Peralta Conde, L.P. Yatsenko, J. Klein, M. Oberst and T. Halfmann Phys. Rev. A 72, 053808, (2005).