Speaker: Sabir Ramazanov Title: Primordial scalar perturbations via conformal mechanisms Abstract: Recently, it has been proposed to relate properties of primordial scalar perturbations to the conformal invariance of some very early Universe models. A concrete realization of this idea is given in the context of conformal rolling scenario. The main ingredient of the latter is the complex scalar field conformally coupled to gravity and rolling down the negative quartic potential. During the conformal rolling, phase perturbations acquire flat power spectrum, which can be converted into adiabatic perturbations at some later epoch by one of another mechanism. There are two sub-scenarios of the model depending on behavior of cosmologically interesting modes by the end of the rolling: one with superhorizon modes and the other with subhorizon ones. In the latter case, phase perturbations proceed to evolve at the intermediate stage between conformal rolling and conventional epoch. We discuss basic predictions of both sub-scenarios and argue that some of them are in sharp contrast with ones in the general inflationary framework. We also briefly review the novel cosmological scenario of the early Universe, where the potential role of conformal symmetries is understood from a much broader prospective. In this picture, proposed by Hinterbichler and Khoury, conformal rolling scenario is just a particular case in a myriad of possible models.