Rostock 2019 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Optomechanics
Q 62.6: Vortrag
Freitag, 15. März 2019, 12:00–12:15, S SR 111 Maschb.
Quantum noise limited microwave to optics conversion — •Moritz Forsch1, Robert Stockill1, Andreas Wallucks1, Igor Marinković1, Claus Gärtner1,2, Richard Norte1, Frank van Otten3, Andrea Fiore3, Kartik Srinivasan4, and Simon Gröblacher1 — 1Delft University of Technology, Delft, The Netherlands — 2University of Vienna, Vienna, Austria — 3Eindhoven University of Technology, Eindhoven, The Netherlands — 4National Institute of Standards and Technology, Gaithersburg, USA
Conversion between microwave and telecom signals is of great interest for both classical and future quantum telecommunication. In the quantum regime, it allows for the transport of quantum signals over long distances which would otherwise be impossible in the microwave regime. For quantum applications, it is necessary to keep the amount of added classical noise during this conversion process to a minimum. Here, we demonstrate mechanically mediated conversion with less than a single phonon of thermal noise added. We achieve this using a hybrid electro-opto-mechanical system which couples surface acoustic waves driven by a resonant microwave signal to an optomechanical crystal with a mechanical mode at 2.7 GHz. By cooling the mechanical mode at the core of this transduction process into the quantum ground state, we reduce the added thermal noise to less than one phonon. Furthermore, we show that the coherence of the input state is preserved throughout the entire transduction process, even for very weak coherent input states corresponding to only one coherent phonon in the resonator.