Electromagnetic Response of High-Frequency Gravitational Waves by Coupling Open Resonant Cavity

Abstract

We present a new detecting scheme of high-frequency gravitational waves (HFGWs) in the GHz band, the scheme consists of a high-quality-fact or open microwave cavity, a static magnetic field passing through the cavity and an electromagnetic (EM) normal mode stored in the cavity It is found that under the resonant condition first-and second-order perturbation EM effects have almost the same detecting sensitivity to the HFGWs in the GHz band (h ∼ 10−26, ν ∼ 5 GHz), but the former contains more information from the HFGWs. We also provide a very brief review for possible improving way of the sensitivity This scheme would be highly complementary to other schemes of detecting the HFGWs.