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Gravitational Wave Detection with High Frequency Phonon Trapping Acoustic Cavities
There are a number of theoretical predictions for astrophysical and
cosmological objects, which emit high frequency (~Hz) Gravitation
Waves (GW) or contribute somehow to the stochastic high frequency GW
background. Here we propose a new sensitive detector in this frequency band,
which is based on existing cryogenic ultra-high quality factor quartz Bulk
Acoustic Wave cavity technology, coupled to near-quantum-limited SQUID
amplifiers at ~mK. We show that spectral strain sensitivities reaching
per per mode is possible, which in principle can
cover the frequency range with multiple () modes with quality factors
varying between allowing wide bandwidth detection. Due to its
compactness and well established manufacturing process, the system is easily
scalable into arrays and distributed networks that can also impact the overall
sensitivity and introduce coincidence analysis to ensure no false detections.Comment: appears in Phys. Rev. D, (2014
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