Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 40: Poster: Quantum Optics and Photonics II
Q 40.50: Poster
Mittwoch, 8. März 2017, 17:00–19:00, P OG2
Coupling cold atoms to a cryogenically cooled optomechanical device — •Philipp Christoph1, Jan Petermann1, Tobias Wagner1, Christina Staarmann1, Klaus Sengstock1,2, Christoph Becker1,2, Hai Zhong3, Alexander Schwarz3, and Roland Wiesendanger3 — 1Center for Optical Quantum Technologies, Luruper Chaussee 149 , 22761, Hamburg, Germany — 2Institute of Laser Physics, Luruper Chaussee 149 , 22761 Hamburg, Germany — 3Institute for Applied Physics, Jungiusstrasse 11, 20355 Hamburg, Germany
We present work towards a new hybrid quantum system consisting of a sample of cold atoms coupled to a cryogenically precooled mechanical oscillator. Our ultimate goal is the investigation of two very different macroscopically large quantum systems coherently coupled to each other. For this purpose we have set up a Rubidium-BEC apparatus coupled to a SiN membrane placed inside a fiber Fabry Perot cavity via an optical lattice. This membrane in the middle system is cooled to below 500mK in a dilution refrigerator. We present details on the coupling lattice laser system and a highly sensitive homodyne setup for detecting and manipulating the membrane motion. The coupling lattice is operated very close to atomic resonance in order to allow for the required large lattice depth for resonant atom-membrane coupling at low coupling light powers. First results of loading ultracold atoms from a dipole trap into this near resonant lattice are presented.
This work is supported by the DFG grants no. BE 4793/2-1 and SE 717/9-1.