Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 35: Ultracold Atoms I (joint session Q/A)
A 35.1: Vortrag
Donnerstag, 8. März 2018, 10:30–10:45, K 1.022
Multi-mode double-bright EIT cooling (theory) — Nils Scharnhorst1,2, •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
We developed a multi-mode ground state cooling technique based on electromagnetically-induced transparency (EIT) [1]. By involving an additional ground and excited state, two individually adjustable bright states together with a dark state are created. While the dark state suppresses carrier scattering, the two bright states are brought into resonance with spectrally separated motional red sidebands. The approach is scalable to more than two bright states and several dark states by introducing additional laser couplings. For large laser intensities, the Lamb-Dicke theory becomes unsuitable and a description based in a generalized fluctuation-dissipation theorem for non-linear response [2] is presented.
[1] Scharnhorst et al., arXiv:1711.00738, arXiv:1711.00732, (2017).
[2] Cerrillo et al., PRB 94, 214308 (2016).