Heidelberg 2015 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics III
Q 62.74: Poster
Donnerstag, 26. März 2015, 17:00–19:00, C/Foyer
Hybrid optomechanics with ultracold atoms and a nanomechanical membrane — •Tobias Kampschulte1, Andreas Jöckel1, Aline Faber1, Lucas Beguin1, Berit Vogell2, Klemens Hammerer3, Peter Zoller2, and Philipp Treutlein1 — 1Universität Basel, Departement Physik — 2Universität Innsbruck, IQOQI — 3Universität Hannover, Institut für theoretische Physik
Hybrid systems in which a mechanical degree of freedom is coupled to a microscopic quantum system promise to enable control and detection of mechanical motion on the quantum level. This will create new options for precision sensing and might allow fundamental tests of quantum mechanics. In our experiment we couple the motion of an atomic ensemble to the vibrations of a Si3N4 membrane. We have exploited this coupling to cool the fundamental vibrational mode of the membrane from room temperature to 650±330 mK [1]. Recently we repeated and extended our measurements in a more compact and stable membrane-cavity system, whose size is small enough for cryogenic precooling of the membrane. Further we are developing a new coupling scheme to the internal states of the atoms. This will allow us to use higher frequency oscillators, which are affected less by laser noise. Moreover the internal states of the atoms can be prepared and detected with a higher precision than the motional states. With the technical and conceptional changes, ground state cooling and quantum control of the mechanical oscillator should come within reach.
[1] A. Jöckel et al., Nature Nanotechnology (2014).
[2] B. Vogell et al., Phys. Rev. A 87, 023816 (2013).