Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 35: Ultracold Atoms I (joint session Q/A)
A 35.2: Vortrag
Donnerstag, 8. März 2018, 10:45–11:00, K 1.022
Multi-mode double-bright EIT cooling (Experiment) — •Nils Scharnhost1,2, Javier Cerrillo3, Johannes Kramer1, Ian D. Leroux1, Jannes B. Wübbena1, Alex Retzker4, and Piet O. Schmidt1,2 — 1QUEST Institute for Experimental Quantum Metrology, Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany — 2Institut für Quantenoptik, Leibniz Universität Hannover, 30167 Hannover, Germany — 3Institut für Theoretische Physik, Technische Universität Berlin, 10623 Berlin, Germany — 4Racah Institute of Physics, Hebrew University of Jerusalem, 91904 Jerusalem, Israel
Ground-state cooling (GSC) of ions and atoms is an essential prerequisite for many experiments in quantum optics, e.g. atomic clocks. Sideband cooling and cooling via electromagnetically induced transparency (EIT) are common techniques to achieve GSC. Due to their narrow cooling resonance, both techniques restrict cooling to a narrow frequency range. The desire to scale up the number of ions in quantum systems and to control all relevant (motional) degrees of freedom in such large atomic ensembles demands for novel cooling approaches, such as the capability to simultaneously cool several motional modes.
We developed double-bright EIT (D-EIT) cooling [1] as a novel scalable approach to standard EIT cooling by extending its level scheme by one additional ground and one excited state. D-EIT allows simultaneous GSC of modes around two separated frequencies and we experimentally demonstrate for the first time GSC of all three motional degrees of freedom of a trapped ion within a single, short cooling pulse.
[1] Scharnhorst et al., arXiv: 1711.00732v2 (2017)