Superconducting Levitated Detector of Gravitational Waves
Abstract
A magnetically levitated mass couples to gravity and can act as an effective gravitational wave detector. We show that a superconducting sphere levitated in a quadrupolar magnetic field, when excited by a gravitational wave, will produce magnetic field fluctuations that can be read out using a flux tunable microwave resonator. With a readout operating at the standard quantum limit, such a system could achieve broadband strain noise sensitivity of h 10-20/ Hz for frequencies of 1~kHz~-~1~MHz, opening new corridors for astrophysical probes of new physics.
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