Erlangen 2018 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics V
Q 62.78: Poster
Thursday, March 8, 2018, 16:15–18:15, Redoutensaal
Coupling cold atoms to a cryogenically cooled optomechanical device — •Philipp Christoph1, Tobias Wagner1, Felix Klein1, Hai Zhong2, Alexander Schwarz2, Roland Wiesendanger2, Klaus Sengstock1, and Christoph Becker1 — 1ZOQ-Center for Optical Quantum Technologies, Luruper Chaussee 149, 22761 Hamburg — 2Institute of Applied Physics, University of Hamburg, Jungiusstraße 9-11, 20355 Hamburg
Quantum hybrid systems have recently attracted considerable interest due to their prospects of realizing new setups that combine the benefits of several very different quantum systems. We have built an apparatus to optically couple ultracold atoms to a cryogenically cooled membrane oscillator and present work towards preparing both quantum systems in their ground state while they are coupled to each other. Here we characterize and quantify the atom-oscillator coupling, through sympathetic cooling of the membrane by laser cooled cold atoms inside a magneto optical trap. We investigate the sympathetic cooling rate as a function of different experimental parameters of the magneto optical trap and the coupling beam. We compare our data to a simple theoretical model using two coupled harmonic oscillators [1] and find good agreement in certain parameter regimes. For large optical densities of the atomic cloud a more refined model [2] is required to explain the observed heating of the membrane. This work is supported by the DFG via grants of Wi1277/29-1, BE 4793/2-1 and SE 717/9-1.
[1] B. Vogell et al, Phys. Rev. A 87, 023816 (2013)
[2] J. K. Asboth et al, Phys. Rev. A 77, 063424 (2008)