Paulo Guilherme dos Santos: The Life of a Tower of Scalar Fields

Paulo Guilherme dos Santos is a phd student with David working on a grant from Portugal

We study the cosmological evolution of a continuous tower of massive scalar fields
throughout the expansion history of the universe. We also consider a universe
dominated by the tower. For a primordial power law spectrum, we show that the tower
can eventually dominate the content of the universe for certain values of the
spectral index and, indeed, can lead to late-time accelerated expansion.

Published Feb. 14, 2012 10:49 AM - Last modified Mar. 16, 2012 11:35 AM