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Q: Fachverband Quantenoptik und Photonik

Q 5: Quantum information: Atoms and ions I

Q 5.4: Vortrag

Montag, 17. März 2014, 11:30–11:45, UDL HS3038

Electromagnetically-induced-transparency cooling in a segmented ion trap — •Regina Lechner¹, Thomas Monz¹, Christian Roos^1,2, Michael Brownnutt¹, and Rainer Blatt^1,2 — ¹Institut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck, Austria — ²Institut für Quantenoptik und Quanteninformation der Österreichischen Akademie der Wissenschaften, 6020 Innsbruck, Austria

Trapped ions are one of the most promising implementations towards a fully functional quantum computer. For the construction of traps capable of holding many ions in a linear string, one solution widely used within the community consists in segmenting the trap electrodes. The segmentation permits the generation of anharmonic potentials which can stabilize ions in equidistant positions. This is of interest for both quantum computation and quantum simulation. Large ion crystals have already been realized in segmented traps but effective methods of groundstate-cooling strings and thereby making them more accessible to useful algorithms are still under investigation. One promising scheme to achieve the desired cooling is electromagnetically-induced-transparency (EIT) cooling. This technique offers the advantage of cooling several modes simultaneously which renders the scheme more efficient than conventionally used sideband cooling, especially for larger ion crystals with increased mode numbers.

We implement EIT cooling in a segmented trap showing its effect on ion crystals of varying size in a harmonic trapping potential. The application of EIT cooling for anharmonic potentials is investigated.