Talks

This session will be mostly practical. Within the framework of the 2-species LV model, we will use nullcline analysis to predict the outcome of competition in different situations. These include cases in which either or both competitors are subject to cooperative growth, which can lead to alternative stable states that emerge in (2-species) co-culture, but that are absent in any of the (1-species) monocultures.

We investigate the implications of memory burden on the gravitational wave (GW) spectrum arising from the Hawking evaporation of light primordial black holes (PBHs). By considering both rotating (Kerr) and non-rotating (Schwarzschild) PBHs, we demonstrate that the overproduction of primordial GWs from burdened PBHs could impose stringent constraints on the parameters governing backreaction effects. These constraints, derived from ∆Neff measurements by Planck and prospective experiments such as CMB-S4 and CMB-HD, offer novel insights into the impact of memory burden on PBH dynamics.