Dresden 2011 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 57: Poster 3: Quantengase, Ultrakalte Atome, Ultrakalte Moleküle, Materiewellen Optik, Präzisionsmessungen, Metrologie

Q 57.95: Poster

Donnerstag, 17. März 2011, 16:30–19:30, P1

Paving the way to coherent modern control of quantum optical systems — Timo Denker, Dirk Schütte, Maximilian Wimmer, and •Michèle Heurs — Albert-Einstein-Institut Hannover, Max-Planck-Institut für Gravitationsphysik und Centre for Quantum Engineering and Space-Time Research (QUEST), Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany

Modern control techniques offer highly attractive possibilities when applied to stabilisation tasks in quantum optics and interferometric gravitational wave detection. The approach is inherently multivariable and incorporates a concept of optimality. Moreover, the feasibility of the stabilisation task is known a priori. The highly systematic approach to control yields a thorough understanding of the underlying physics of the system under consideration.

Coherent control on the other hand is a technique of stabilisation that doesn't measure the variable of interest, thereby offering tantalising possibilities for QND type schemes. Recent implementations include the work by Mabuchi et al..

We present our roadmap to achieve a merging of modern and coherent control in the future, and propose experiments to finally reach this goal. We will show recent, current and future quantum optical applications for modern control techniques and coherent control. As an example of modern control in quantum optics we present the frequency stabilisation of an optical cavity, to exemplify the latter we will show preliminary work of treating recycling techniques in interferometric gravitational wave detectors as a coherent control problem.