In a Physics Review Letters paper published on Dec 15th, an international research team, led by Cai Yifu, Professor of the University of Science and Technology of China, and his collaborators discovered the hypothetical possibility of resonantly generating primordial gravitational waves within the high energy physics when the universe was in the babyhood. The originally invisible gravitational wave signals can be amplified by parametric resonance by 4 to 6 orders of magnitude or even larger through this phenomenon, and then become likely to be probed by primordial gravitational wave detectors, hence, validating some theoretical models of the very early universe that are “inaccesible” in traditional observational windows.
Click here for original story, Breakthrough in the nonlinear generation of primordial gravitational waves
Source: Phys.org