Darmstadt 2008 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 30: Poster Präzisionsmessungen und Metrologie

Q 30.3: Poster

Tuesday, March 11, 2008, 16:30–19:00, Poster C2

A quantum radiation-pressure noise dominated interferometer — •Stefan Goßler, Yanbei Chen, Stefan Danilishin, Daniel Friedrich, Kentaro Somiya, Tobias Westphal, Kazuhiro Yamamoto, Karsten Danzmann, and Roman Schnabel — MPI für Gravitationsphysik (AEI) und Institut für Gravitationsphysik der Leibniz Universität Hannover, Callinstr.38, 30167 Hannover

The second generation of interferometric gravitational-wave detectors will be limited by quantum noise of the light field in most of the detection band: while shot noise will limit the sensitivity at high frequencies it is quantum radiation-pressure noise that will be limiting at low frequencies. Despite the effort of various groups all over the world so far no interferometric measurement that is dominated by quantum radiation-pressure noise has been obtained yet. A mechanical device to couple the quantum fluctuations of the light field to displacement of a sensor is crucial to these measurements. We present our design of such a sensor and the general concept to accomplish the first ever measurement of quantum radiation-pressure noise.