Colloquium
Colloquium

Testing Superstring Theory with Cosmological Observations?

Robert Brandenberger

McGill University

         Superstring theory promises to unify all four forces of nature at the quantum level. Therefore, superstring theory should play an important role in early universe cosmology. I will argue that taking into account new degrees of freedom and new symmetries which distinguish string theories from point particle theories will lead to a non-singular early universe and a new mechanism of cosmological structure formation which is consistent with current data but makes interesting predictions for future observations, in particular for the spectrum of primordial gravitational waves.