Gravitational Waves from Oscillons with Cuspy Potentials

Jing Liu, Zong-Kuan Guo, Rong-Gen Cai, Gary Shiu
2018 Physical Review Letters  
We study the production of gravitational waves during oscillations of the inflaton around the minimum of a cuspy potential after inflation. We find that a cusp in the potential can trigger copious oscillon formation, which sources a characteristic energy spectrum of gravitational waves with double peaks. The discovery of such a double-peak spectrum could test the underlying inflationary physics.
doi:10.1103/physrevlett.120.031301 pmid:29400500 fatcat:ewihpamxdfdw5o7ypca3j3sraa