Heidelberg 2015 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 57: Optomechanics II
Q 57.1: Talk
Thursday, March 26, 2015, 14:30–14:45, P/H1
Sympathetic cooling of a membrane oscillator in an hybrid mechanical-atomic system — •A. Faber1, A. Jöckel1, T. Kampschulte1, M. Korppi1, M. T. Rakher1, L. Beguin1, B. Vogell2, K. Hammerer3, P. Zoller2, and P. Treutlein1 — 1Universität Basel, Departement Physik — 2Universität Innsbruck, IQOQI — 3Universität Hannover, Institut für theoretische Physik
Sympathetic cooling with ultracold atoms and atomic ions enables ultralow temperatures in systems where direct laser or evaporative cooling is not possible. So far, it has only been used to cool other microscopic particles such as atoms of a different species or molecular ions up to the size of proteins. In our experiment we use ultracold atoms to sympathetically cool the fundamental vibration of a Si3N4 membrane from room temperature to 650±330 mK [1]. The interactions between the atoms and the membrane are mediated by laser light over a macroscopic distance and are enhanced by an optical cavity around the membrane [2]. This enables effective cooling although the mass of the membrane exceeds that of the atoms by 1010. Our hybrid optomechanical system operates in a regime of large atom-membrane cooperativity and will with further improvements enable a number of exciting experiments on quantum control of mechanical motion.
[1] A. Jöckel et al., Nature Nanotechnology (2014).
[2] B. Vogell et al., Phys. Rev. A 87, 023816 (2013).