Feb 19, 2003
The Challenging Cosmological Singularity
Dr. Hong Liu, Rutgers
In this talk we will describe recent efforts in understanding cosmic
singularities in string theory. We will start by motivating the need of
going beyond general relativity in studying singularities, and review a
few static examples in which they are successfully understood in string
theory. We will then study in classical string theory a toy model with a
Big Bang type of singularity. We will show that classical string theory is
not sufficient to resolve this singularity, and therefore a better
understanding of the full quantum theory will be needed. Lessons of the
results and implications to some recently proposed cosmological scenarios
will be discussed.
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