Based on ArXiv 2504.17680, B. Blachier, C. Ringeval (2025)
Cosmic inflation may exhibit stochastic periods during which quantum fluctuations dominate over the semi-classical evolution. Extracting observables in these regimes is a notoriously difficult program as quantum randomness makes them fully probabilistic. However, among all the possible quantum histories, the ones which are relevant...
The dynamics of neutrinos and antineutrinos within a QED plasma, around MeV temperatures (just prior to their decoupling), influences several key cosmological observables. Precision studies have become timely, and we recently computed the NLO interaction rate as a function of the neutrino momentum and flavour, finding relative corrections on the few percent level [1]. I will summarise this...
Mounting theoretical evidence suggests that the information stored in black holes suppresses their evaporation rate – a quantum effect known as memory burden. This phenomenon opens up a new window for small primordial black holes (PBHs) below $10^{15}\, \text{g}$ as viable dark matter candidates. In this talk, I will discuss observational signals from such small PBHs. Beyond constraints from...
