Abstract: Inverse scattering theory is a final step of the well known inverse scattering transform method. It does not represent difficulties in 1+1 models but becomes much more complicated for 1+2 models.
Abstract: The recent discovery of the accelerated cosmic expansion suggests that our universe may be endowed with a positive cosmological constant Λ. In addition, even though general relativity (GR) is a very successful and well-tested theory, it could be that it is not the final theory of gravity. Brans-Dicke theory is the one of the first and simplest modifications of Einstein’s theory. In this seminar, I will present the study of cosmic structures in Brans-Dicke like scalar-tensor theories in the presence of a positive cosmological constant. I will discuss the validity of the no-hair theorem in the context of such theories. Moreover, I will show that, the black hole solutions in these theories are no different from those in GR and also that the presence of a stationary cosmological event horizon rules out any regular spherical stationary solution, appropriate for the description of a star.
Abstract: A phase-space noncommutativity (NC) is considered in the context of a Kantowski-Sachs cosmological model. Then, the interior of a Schwarzschild black hole is analyzed.
Abstract: In general relativity a single massive real scalar field can form long living stable oscillating localized configurations, which are generally called oscillatons. These objects are quite similar to the well known boson stars.
Gr@v is a partner of the recently approved "Strong Gravity and High Energy Physics" Marie Curie RISE (Research and Innovation Staff Exchange) action, within the Horizon 2020 European framework. This network has a lifetime of 4 years, starting in Jan 2016 and connects 8 nodes in 7 countries, being coordinated by Prof. Ulrich Sperhake and Cambridge University.
Abstract: I will present a detailed study of the Entanglement Entropy for the confining Klebanov-Strassler background coupled to a large number of dynamical flavors.
Our group coordinated the "Numerical Relativity and High Energy Physics" IRSES network (2012-2015). Here is a list of the global network meetings organized: