Probing the primordial Universe by detecting high-frequency gravitational waves with resonant electromagnetic cavities

Abstract

The first detection of gravitational waves in 2015 by LIGO/VIRGO [Abbott et al., 2016] with interferometers is one of the most wonderful scientific achievements in this century, leading to a brand new astronomy era. The frequency content of such waves is at the order of the hertz, but there are several interests in much higher frequencies, above megahertz. Interferometers can not detect such high frequency content. In this thesis we are going to study high-frequency gravitational wave possible detection using electromagnetic fields, through the inverse Gertsenshtein effect. Our detector is a patented [Füzfa, 2018] cylindrical electromagnetic cavity immersed in an intense external magnetic field. We study how we could detect two high-frequency sources that are witnesses of the early Universe, which are primordial black holes and stochastic gravitational wave background. We will study analytically and numerically the possible detection of these signals, showing how we can get information about those primordial Universe objects.

Date of Award	27 Jan 2023
Original language	English
Awarding Institution	University of Namur
Sponsors	University of Namur
Supervisor	Andre Fuzfa (Supervisor), Alexandre Mauroy (President), Andreas Ringwald (Jury), Sébastien Clesse (Jury), Aldo Ejlli (Jury), Michael Lobet (Jury) & Massimiliano RINALDI (Jury)