Towards the design of gravitational-wave detectors for probing neutron-star physics
Author(s)
Miao, Haixing; Yang, Huan; Martynov, Denis
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The gravitational waveform of merging binary neutron stars encodes information about extreme states of matter. Probing these gravitational emissions requires the gravitational-wave detectors to have high sensitivity above 1 kHz. Fortunately for current advanced detectors, there is a sizeable gap between the quantum-limited sensitivity and the classical noise at high frequencies. Here we propose a detector design that closes such a gap by reducing the high-frequency quantum noise with an active optomechanical filter, frequency-dependent squeezing, and high optical power. The resulting noise level from 1 to 4 kHz approaches the current facility limit and is a factor of 20 to 30 below the design of existing advanced detectors. This will allow for precision measurements of (i) the postmerger signal of the binary neutron star, (ii) late-time inspiral, merger, and ringdown of low-mass black hole–neutron star systems, and possible detection of (iii) high-frequency modes during supernovae explosions. This design tries to maximize the science return of current facilities by achieving a sensitive frequency band that is complementary to the longer-baseline third-generation detectors: the 10 km Einstein Telescope and 40 km Cosmic Explorer. We have highlighted the main technical challenges towards realizing the design, which requires dedicated research programs. If demonstrated in current facilities, the techniques can be transferred to new facilities with longer baselines.
Date issued
2018-08Department
MIT Kavli Institute for Astrophysics and Space Research; LIGO (Observatory : Massachusetts Institute of Technology)Journal
Physical Review D
Publisher
American Physical Society
Citation
Miao, Haixing, et al. “Towards the Design of Gravitational-Wave Detectors for Probing Neutron-Star Physics.” Physical Review D, vol. 98, no. 4, Aug. 2018. © 2018 American Physical Society
Version: Final published version
ISSN
2470-0010
2470-0029