Electromagnetic Gravitational Waves Antennas for Directional Emission and Reception

Abstract

A successful experiment combining emission and reception of gravitational waves (GWs) would constitute a premiere of gravity control. However, such experiments manipulating gravity would require to compactly store large amounts of energy while using ultra-sensitive detection techniques and hence can be expected to be very difficult to realise. In this paper, we first propose new designs of electromagnetic (EM) generators allowing directional emission of GWs. They are based on the resonant amplification of GWs occuring when EM standing waves couple to an external static magnetic field. The interplay between the EM polarizations, the orientation of the boosting magnetic field and the emitted GW polarizations is studied, as well as the gravitational radiation patterns of the different generators. Then, we develop a new GW directional detection method based on magnetic energy storage. Three possible applications are presented: (i) indirect detection of GW emission by high-accuracy monitoring of the energy loss in the generators ; (ii) direct detection of an incoming plane GW with a high-field magnet and (iii) GW emission-reception experiments. Although current technology allows reaching detection thresholds in these experiments, their practical realisation would still need to overcome several key technical challenges.