Paired carriers as a way to reduce quantum noise of multicarrier 
gravitational-wave detectors

Korobko, Mikhail; Voronchev, Nikita; Miao, Haixing; Khalili, Farid Ya.

doi:10.1103/PhysRevD.91.042004

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Paired carriers as a way to reduce quantum noise of multicarrier gravitational-wave detectors

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Korobko, Mikhail
AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Citation

Korobko, M., Voronchev, N., Miao, H., & Khalili, F. Y. (2015). Paired carriers as a way to reduce quantum noise of multicarrier gravitational-wave detectors. Physical Review D, 91(4): 042004. doi:10.1103/PhysRevD.91.042004.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0024-68D0-D

Abstract

We explore new regimes of laser interferometric gravitational-wave detectors with multiple optical carriers which allow to reduce 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. Relaxing this antisymmetry condition, it is also possible to slightly overcome the SQL in broadband. Combining several such pairs in the xylophone configuration, it is possible to shape the quantum noise spectrum flexibly.