Bibcode
Landau, Susana J.; Scóccola, C. G.; Sudarsky, Daniel
Bibliographical reference
Physical Review D, vol. 85, Issue 12, id. 123001
Advertised on:
6
2012
Journal
Citations
51
Refereed citations
41
Description
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
Diósi [R. Penrose, The Emperor’s New Mind. Concerning
Computers, Minds and Laws of Physics (1989).][R. Penrose, in Physics
meets Philosophy at the Planck Scale: Contemporary Theories in Quantum
Gravity, edited by C. Callendar and N. Huggett (2001), pp.
290-+.][L. Diósi, Phys. Lett. A 120, 377
(1987).PYLAAG0375-960110.1016/0375-9601(87)90681-5][L. Diósi,
Phys. Rev. A 40, 1165 (1989).PLRAAN0556-279110.1103/PhysRevA.40.1165]
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 [A. Perez, H. Sahlmann, and D. Sudarsky,
Classical Quantum Gravity 23, 2317
(2006).CQGRDG0264-938110.1088/0264-9381/23/7/008]. 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.
Related projects
Cosmology with Large Scale Structure Probes
The Cosmic Microwave Background (CMB) contains the statistical information about the early seeds of the structure formation in our Universe. Its natural counterpart in the local universe is the distribution of galaxies that arises as a result of gravitational growth of those primordial and small density fluctuations. The characterization of the
FRANCISCO SHU
KITAURA JOYANES