Berlin 2014 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 33: Micromechanical oscillators
Q 33.5: Vortrag
Donnerstag, 20. März 2014, 11:30–11:45, DO24 1.101
Mechanical state control and tomography using pulsed optomechanics — •Ralf Riedinger1, Michael Vanner1, Joachim Hofer1, Sungkun Hong1, Alex Krause2, Garrett D. Cole1, Oskar Painter2,3, and Markus Aspelmeyer1 — 1Vienna Center for Quantum Science and Technology (VCQ), Faculty of Physics, University of Vienna, A-1090 Vienna, Austria — 2Thomas J. Watson, Sr., Laboratory of Applied Physics, California Institute of Technology (Caltech), Pasadena, CA 91125, USA — 3Max Planck Institute for the Science of Light (MPL),D-91058 Erlangen, Germany
Quantum-non-demolition measurements have become an indispensable tool in quantum science for preparing, manipulating, and detecting quantum states of light, atoms, and other quantum systems. Here we demonstrate first steps into this regime for massive, mechanical oscillators that interact with laser light. Specifically, we exploit ultra-short optical pulses, i.e. of duration much shorter than a period of mechanical motion, to realize a quantum non-demolition interaction for the position readout of a mechanical oscillator. We demonstrate both state preparation via `cooling-by-measurement' and full state tomography of the mechanical motional state. The obtained position uncertainty is limited only by the quantum fluctuations of the optical pulse. We discuss future improvements to this technique, including a route towards quantum squeezing of mechanical motion even from room temperature.