Optimization of quantum noise by completing the square of multiple interferometer outputs in quantum locking for gravitational wave detectors
arXiv:2003.13202 · doi:10.1016/j.physleta.2020.126626
Abstract
The quantum locking technique, which uses additional short low-loss sub-cavities, is effective in reducing quantum noise in space gravitational wave antenna DECIGO. However, the quantum noise of the main interferometer depends on the control systems in the sub-cavities. Here we demonstrate a new method to optimize the quantum noise independently of the feedback gain by completing the square in the quantum locking system. We successfully demonstrate in simulations that this method is effective in optimizing the homodyne angle to the best quantum-noise-limited sensitivity.
arXiv comment9 pages, 9 figures
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- Reduction of quantum noise using the quantum locking with an optical spring for gravitational wave detectors
- First-step experiment in developing optical-spring quantum locking for DECIGO: sensitivity optimization for simulated quantum noise by completing the square
- Detection Landscape in the Deci-Hertz Gravitational-Wave Spectrum
- Conceptual design and science cases of a juggled interferometer for gravitational wave detection
- Quantum noise in a Fabry-Perot interferometer including the influence of diffraction loss of light
- Can the phase of radiation pressure fluctuations be flipped in a single path for laser interferometric gravitational wave detectors?