Physics

Despite impressive phenomenological successes, cosmological models are incomplete without an understanding of what happened at the big bang singularity. In this talk, based on work with T. Hertog and N. Turok (and following on the earlier seminar by...

We will consider stability in the string theory landscape. A survey over several classes of flux vacua with different characteristics indicates that the vast majority of flux vacua with small cosmological constant are unstable to rapid decay to a...