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Q: Quantenoptik

Q 48: Poster: Fallen und Kühlung

Q 48.12: Poster

Donnerstag, 27. März 2003, 16:30–18:30, Lichthof

Microwave and optical Raman spectroscopy of single Cs atoms — •Yevhen Miroshnychenko, Mkrtych Khudaverdyan, Stefan Kuhr, Wolfgang Alt, Dominik Schrader, Igor Dotsenko, Wenjamin Rosenfeld, Victor Gomer, Arno Rauschenbeutel, and Dieter Meschede — Institut fuer Angewandte Physik,

We perform spectroscopy on single Cs atoms stored in a standing wave dipole trap. Driving both microwave and optical Raman transitions between the atomic hyperfine levels allow us to study the properties of internal and motional states of the trapped atoms. Efficient preparation and detection of hyperfine states of single atoms form the basis of these measurements.
Two photon optical Raman transitions coherently couple the two hyperfine ground states of the Cs atoms and allow us to observe Rabi oscillations and record a Zeeman spectrum. In addition we resolve vibrational sidebands of single atoms oscillating in the potential wells of the standing wave dipole trap. This is a necessary pre-requisite for Raman cooling and will allow us to measure the temperature of the atoms after successful cooling into the motional ground state of the trapping potential.
Microwaves allow for the immediate coupling of the atomic hyperfine levels by inducing magnetic dipole transitions. In addition to observing Rabi oscillations we perform Ramsey spectroscopy and spin echo measurements to study the coherence properties of the trapped atoms, demonstrating that the ground state hyperfine levels of the trapped atoms are suitable candidates for the storage of quantum information.