Berlin 2014 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 32: Poster: Quantum gases, ultracold atoms and molecules
Q 32.69: Poster
Wednesday, March 19, 2014, 16:30–18:30, Spree-Palais
Excitation of the 3P0 clock transition in a Fermi gas of ytterbium — •Francesco Scazza1,2, Christian Hofrichter1,2, Moritz Höfer1,2, Pieter C. de Groot1,2, Christian Schweizer1,2, Emily Davis1,2, Immanuel Bloch1,2, and Simon Fölling1,2 — 1MPI für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany — 2Ludwig-Maximilians-Universität München, Schellingstraße 4, 80799 München, Germany
We report on the realization of a setup for probing the ultra-narrow 3P0 clock transition of neutral ytterbium. In our setup we trap and cool a gas of fermionic 173Yb atoms to the quantum degenerate regime.
The Fermi gas is loaded into an optical lattice operating at the magic wavelength of the ground and 3P0 states. The coupling to the clock state is achieved by shining resonant narrow-linewidth laser light, obtained by stabilization to an ULE cavity reference.
Atomic population excitation with an absorption linewidth down to a few tens of Hertz was demonstrated. Rabi oscillations in a spin polarized gas indicate that this linewidth is limited by laser light coherence.
We report on spin state selective spectroscopy of the gas in a 3-dimensional lattice. Occupation number dependent shifts of the clock transition resonance were observed and characterized, as well as inelastic collisional processes involving the 3P0 state.