Susana J. Landau, Claudia G. Scóccola, Daniel Sudarsky
We briefly review an important shortcoming --unearthed in previous works-- of
the standard version of the inflationary model for the emergence of the seeds
of cosmic structure. We consider here some consequences emerging from a
proposal inspired on ideas of Penrose and Di\'osi about a quantum-gravity
induced reduction of the wave function, which has been put forward to address
the shortcomings, arguing that its effect on the inflaton field is what can
lead to the emergence of the seeds of cosmic structure. The proposal leads to a
deviation of the primordial spectrum from the scale-invariant
Harrison-Zel'dovich one, and consequently, to a different CMB power spectrum.
We perform statistical analyses to test two quantum collapse schemes with
recent data from the CMB, including the 7-yr release of WMAP and the matter
power spectrum measured using LRGs by the Sloan Digital Sky Survey. Results
from the statistical analyses indicate that several collapse models are
compatible with CMB and LRG data, and establish constraints on the free
parameters of the models. The data put no restriction on the timescale for the
collapse of the scalar field modes.
View original:
http://arxiv.org/abs/1112.1830
No comments:
Post a Comment