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Informal Pizza SeminarThe Cosmology of Massless String Modes: Radii Stabilization in GRSubodh PatilBrown UniversityWe consider the effects of a string gas in 10+1D General Relativity (GR) and derive the resulting spacetime dynamics. It is shown that thermal equilibrium implies that only the near massless modes contribute to the energy momentum tensor. Such modes have a qualitatively different behaviour than those modes usually considered in the literature. Many surprising features result, including a robust stabilization mechanism for the radii of compact dimensions, which evades violating the Dominant Energy conditions of GR (-1 < w < 1), and an analytical demonstration of the isotropy of the background. Applications to Brane Gas Cosmology and the Cyclic/Ekpyrotic scenario are dicussed.
Tuesday, October 12th 2004, 13:00
Ernest Rutherford Physics Building, room 326 |