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Testing Superstring Theory with Cosmological Observations?

Colloquium

Testing Superstring Theory with Cosmological Observations?

McGill ¾Å¾Å¸£ÀûÍø

         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.