Primordial tensor power spectrum in holonomy correctedΩloop quantum cosmology
نویسندگان
چکیده
منابع مشابه
Holonomy Corrections to the Cosmological Primordial Tensor Power Spectrum
Loop quantum gravity is one of the leading candidate theory to non-perturbatively quantize gravity. In this framework, holonomy corrections to the equation of propagation of gravitons in a FLRW background have been derived. We investigate the consequences of those corrections on the tensor power spectrum in de-Sitter and slow-roll inflations, for n=-1/2. Depending on the value of the Barbero-Im...
متن کاملPrimordial black hole evolution in tensor-scalar cosmology
∗E-mail: [email protected] to g∗μν are commonly referred to as being given in the “Einstein frame” while those defined with respect to g̃μν are said to be in the “Jordan-Fierz frame”. Damour and Nordtvedt [2] identified a generic attractor mechanism which drives a tensor-scalar cosmology to a purely tensor (Einstein) one at late times, thus significantly increasing the plausibility of the...
متن کاملReconstructing the primordial power spectrum
We reconstruct the shape of the primordial power spectrum from the latest cosmic microwave background data, including the new results from the Wilkinson Microwave Anisotropy Probe (WMAP), and large scale structure data from the two degree field galaxy redshift survey (2dFGRS). We tested four parameterizations taking into account the uncertainties in four cosmological parameters. First we parame...
متن کاملReconstructing the Primordial Power Spectrum
The combination of Cosmic Microwave Background (CMB) anisotropy measurements and Large-Scale Structure observations has caused dissatisfaction with the standard Cold Dark Matter (sCDM) cosmogony, leading some to advocate a “tilt” of the primordial power spectrum away from scale-invariant (n = 1) to n = 0.8− 0.9. 1 Other CDM cosmogonies have not commonly been tilted but their agreement with the ...
متن کاملTensor modes from a primordial Hagedorn phase of string cosmology.
It has recently been shown that a Hagedorn phase of string gas cosmology can provide a causal mechanism for generating a nearly scale-invariant spectrum of scalar metric fluctuations, without the need for an intervening period of de Sitter expansion. In this Letter, we compute the spectrum of tensor metric fluctuations (gravitational waves) in this scenario and show that it is also nearly scale...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2013
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.87.107503