Hamburg 2016 – wissenschaftliches Programm
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GR: Fachverband Gravitation und Relativitätstheorie
GR 16: Gravitational Waves
GR 16.5: Vortrag
Freitag, 4. März 2016, 10:05–10:25, VMP6 HS A
Tailoring the quantum noise of gravitational-wave detectors — •Mikhail Korobko1,2, Nikita Voronchev3, Haixing Miao4, and Farid Khalili3 — 1Institut für Laserphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany — 2Institut für Gravitationsphysik, Leibniz Universität Hannover and Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), Callinstr. 38, 30167 Hannover, Germany — 3Faculty of Physics, Moscow State University, Moscow 119991, Russia — 43School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, United Kingdom
We explore new regimes of laser interferometric gravitational-wave detectors with multiple optical carriers which allow us to tailor the quantum noise of these detectors. In particular, we show that using two carriers with the opposite detunings, homodyne angles, and squeezing angles, but identical other parameters (the antisymmetric carriers), one can suppress the quantum noise in such a way that its spectrum follows the Standard Quantum Limit (SQL) at low frequencies. Combining several such pairs in the xylophone configuration, it is possible to shape the quantum noise spectrum flexibly. We show that it is possible to significantly increase the narrowband sensitivity at frequencies of interest (where the known sources of GW are located), without affecting the broadband behaviour.