Seminar Henri van der Heiden

Henri van der Heiden
Signs of Inflation in the Cosmic Microwave Background Radiation

In the past two decades various measurements of the cosmic microwave background radiation (CMB), by COBE in 1992 and by WMAP in 2001, have radically changed our picture of the universe. In particular, the measurements motivate the concept of cosmic inflation, a period during which the universe expanded exponentially.
An important feature of the CMB is the presence of small anisotropies, the seeds of large scale structure. Quantum fluctuations of the scalar field that drives inflation are thought to have been blown up to large classical scales during inflation, thus causing scalar perturbations of the curvature of spacetime.
In my talk I will first introduce the concept of slow-roll single field inflation. After that, the cosmological perturbation theory that describes the evolution of theperturbations will be discussed. Finally, the observational consequences for the CMB measurements, in particular the future measurements of the Planck satellite, will be discussed.

Monday, June 22, 2009 - 16:00