Axion detection by ring lasers
L. Cooper, G. E. Stedman
Abstract
A ring-laser experiment, similar to the Canterbury ring laser, to detect axion- and qed-induced vacuum birefringence is proposed. It uses a slowly modulated magnetic field and a novel polarization geometry. Both axion coupling and vacuum birefringence would modulate the Sagnac beat frequency. A null result could place sensitive bounds on the axion mass and on two-photon coupling.
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