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A low-frequency superconductor oscillator with a 10^10-quality factor

O. F. Schilling
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Abstract

This letter describes a very simple electromechanical oscillator, consisting of a strong-pinning Nb-Ti superconductor loop subjected to static magnetic fields. A detailed calculation of the losses occurring during its low-frequency oscillations is carried out. The conclusion is that the quality factor for such oscillator might reach the 10^10-10^11 range, something comparable only to the best optical microcavities. Such device might permit the measurement of variations in static forces with the same precision a superconducting quantum interference device (SQUID) measures variations of magnetic field, providing a new tool for probing minute variations of the gravitational field. for instance.

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O. F. Schilling. 2005-10-27. A low-frequency superconductor oscillator with a 10^10-quality factor. https://arxiv.org/abs/cond-mat/0510767

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