Reduction of quantum noise using the quantum locking with an optical spring for gravitational wave detectors
arXiv:2012.11074 · doi:10.1016/j.physleta.2021.127365
Abstract
In our previous research, simulation showed that a quantum locking scheme with homodyne detection in sub-cavities is effective in surpassing the quantum noise limit for Deci-hertz Interferometer Gravitational Wave Observatory (DECIGO) in a limited frequency range. This time we have simulated an optical spring effect in the sub-cavities of the quantum locking scheme. We found that the optimized total quantum noise is reduced in a broader frequency band, compared to the case without the optical spring effect significantly improving the sensitivity of DECIGO to the primordial gravitational waves.
arXiv comment15 pages, 10 figures
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