Todos os Eventos

Local: Sala 201

Título: Testing String Theory with Cosmological Observations

Resumo: The inflationary scenario is the current paradigm of early universe cosmology. The scenario, however, suffers from some key conceptual problems. In light of these problems, it is important to consider the possibility of other scenarios. I will present an early universe scenario based on some fundamental principles of superstring theory. This scenario may lead to a non-singular cosmology. It gives rise to a mechanism of structure formation different from the one which is operative in inflationary cosmology. The scenario is consistent with current observations but makes predictions concerning the spectrum of gravitational waves with which it can be differentiated from inflationary cosmology.