Flávio Coelho visits Wits University
Flávio Coelho is currently visiting Wits University in South Africa, to continue his work on n-DBI gravity in collaboration with Shinji Hirano, who joined the academic staff of Wits in 2013.
Flávio Coelho is currently visiting Wits University in South Africa, to continue his work on n-DBI gravity in collaboration with Shinji Hirano, who joined the academic staff of Wits in 2013.
Abstract: Three-forms can give rise to viable cosmological scenarios of inflation and dark energy with potentially observable signatures distinct from standard single scalar field models. When applied to inflation, a three-form can provide a scale invariant scalar perturbations power spectrum and I will discuss the effect on primordial non-gaussianity. Finally I will discuss a
Thomas Metcalf, a graduate student from the University of Edinburgh, is visiting our group from October to December 2013. Thomas is currently working with João Rosa in particle physics and cosmological models of warm inflation.
Abstract: We discuss the main features of a phase-space noncommutative model of quantum mechanics and its applications for quantum cosmology and black holes in the context of the Kantowski-Sachs minisuperspace geometry.
Abstract: A new generation of radio telescopes with unprecedented capabilities for astronomy and fundamental physics will be in operation over the next few years. I will address some of the possibilities for Cosmology offered by this new generation of telescopes, such as ASKAP, MeerKAT, LOFAR and the future SKA.
Abstract: In this talk we discuss the quantum theory of a scalar field on LQC Bianchi I geometry. By focusing on single modes of the scalar field, we show that, evolution of the quantum field on the background quantum space-time leads to a classical effective geometry emerging whose components depend on the quantum geometrical operators.
Abstract: The Eddington-inspired Born-Infeld (EiBI) theory of gravity has many attractive features. In particular, it may lead to a non- singular description of the Universe and it may accommodate compact stars made of pressureless dust.