My research is aimed at understanding the interconnectivity between the basic problems of theoretical cosmology. If we gain a better understanding of what these problems have in common, we can also get much closer to resolving these remaining, fundamental problems.
Three of the basic problems of cosmology are the information problem for black holes, the problem of the quantum mechanical origins of our universe and the problem of the cosmological constant (understanding of dark energy). These three problems all have a common root in our description of gravity on a fundamentally quantum mechanical plan. Assuming that this description ties the problems together, we explore new possible solutions to these problems.
Cosmic inflation is considered to be the most successful paradigm for the origin of the universe from the Big Bang, but the underlying theory of cosmic inflation is still not fully understood or developed. As a consequence much of our work is thus focused on understanding the theory of inflation and possible generalizations or alternatives, such as the Curvaton mechanism.
In addition, there is also the problem of the origin of dark matter. Usually it is assumed that dark matter is created in the early universe through very weak interactions with ordinary matter. However, we have not discovered such weak interactions with new particles at the LHC at CERN. In fact, the only conclusive evidence of the existence of dark matter observations is that it is influenced by gravity. Hence, we are now working on the development of a minimal model of dark matter where dark matter has only gravitational interactions with ordinary matter. Our candidate for dark matter is the darkest and coldest possible and is called the "Planckian Interacting Dark Matter" (PIDM).