Congratulations to Giovanni Piccoli, who today successfully defended his MSc thesis, by the title of “The very small-scale primordial Universe: complementary tests from Cosmic Neutrinos and Gravitational Waves” (with the opponent being Prof. Alessandro Roggero)! Giovanni’s defense was simply outstanding, and he received top grades and honours, i.e. 110 e Lode. In his thesis which I supervised, Giovanni developed complementary tests of the small-scale power spectrum of primordial fluctuations using the stochastic gravitational wave background measured by pulsar timing arrays, and forecasting the reach in this sense of a potential future measurement of the cosmic neutrino background (CNB) from laboratory experiments. What does the CNB have to do with the small-scale power spectrum? We’re writing up a paper based on Giovanni’s results, and I can guarantee it will be extremely exciting, so no spoilers!
