Kavli Affiliate: Clarence Chang
| First 5 Authors: Clarence Chang, T. J. Hobbs, Dafei Jin, Yi Li, Marharyta Lisovenko
| Summary:
We introduce an array-scalable, magnon-based detector (MOSAIC) to search for
the spin-dependent interactions of electron-coupled axion dark matter. These
axions can excite single magnons in magnetic targets, such as the yttrium iron
garnet (YIG) spheres used here, which are subsequently sensed by the detector.
For MOSAIC, this sensing is implemented by coupling the magnons in the YIG
spheres to magnetic-field-resilient single-electron charge-qubits, whose state
is then interrogated with a quantum non-demolition measurement. Using standard
superconducting fabrication techniques, MOSAIC can integrate many YIG
sphere-qubit sensors, forming a large detector array. We outline the detector
design and operation, and determine its sensitivity to axion dark matter. We
find that a detector built with available technology will exceed the
sensitivity of previous ferromagnetic haloscopes, and provides a platform where
further improvements in performance would search for electron-coupled axion
dark matter in unexplored parameter space.
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