Searching for Vector Dark Matter with an Optomechanical Accelerometer

We consider using optomechanical accelerometers as resonant detectors for ultralight dark matter. As a concrete example, we describe a detector based on a silicon nitride membrane fixed to a beryllium mirror, forming an optical cavity. The use of different materials gives access to forces proportion...

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Bibliographic Details
Published in:Physical review letters 2021-02, Vol.126 (6), p.061301-061301, Article 061301
Main Authors: Manley, Jack, Chowdhury, Mitul Dey, Grin, Daniel, Singh, Swati, Wilson, Dalziel J
Format: Article
Language:English
Subjects:
Accelerometers
Beryllium
Dark matter
Leptons
Membranes
Particle mass
Silicon nitride
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Summary:We consider using optomechanical accelerometers as resonant detectors for ultralight dark matter. As a concrete example, we describe a detector based on a silicon nitride membrane fixed to a beryllium mirror, forming an optical cavity. The use of different materials gives access to forces proportional to baryon (B) and lepton (L) charge, which are believed to be coupling channels for vector dark matter particles ("dark photons"). The cavity meanwhile provides access to quantum-limited displacement measurements. For a centimeter-scale membrane precooled to 10 mK, we argue that sensitivity to vector B-L dark matter can exceed that of the Eöt-Wash experiment in integration times of minutes, over a fractional bandwidth of ∼0.1% near 10 kHz (corresponding to a particle mass of 10^{-10}  eV/c^{2}). Our analysis can be translated to alternative systems, such as levitated particles, and suggests the possibility of a new generation of tabletop experiments.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.126.061301