scholarly journals The Observational Status of Cosmic Inflation After Planck

2016 ◽  
pp. 41-134 ◽  
Author(s):  
Jérôme Martin
Keyword(s):  
Cosmic Inflation ◽  
Observational Status

scholarly journals SMOOTHED QUANTUM FLUCTUATIONS AND CMB OBSERVATIONS

2012 ◽  
Vol 21 (10) ◽  
pp. 1250080
Author(s):  
JAKUB MIELCZAREK ◽  
MICHAŁ KAMIONKA
Keyword(s):  
Scalar Field ◽  
Power Spectrum ◽  
Internal Structure ◽  
Planck Scale ◽  
Quantum Fluctuations ◽  
Gaussian Smoothing ◽  
Cosmic Inflation ◽  
Smoothing Factor ◽  
High Multipoles

In this paper, we investigate power spectrum of a smoothed scalar field. The smoothing leads to regularization of the UV divergences and can be related with the internal structure of the considered field or the space itself. We perform Gaussian smoothing to the quantum fluctuations generated during the phase of cosmic inflation. We study whether this effect can be probed observationally and conclude that the modifications of the power spectrum due to the smoothing on the Planck scale are negligible and far beyond the observational abilities. Subsequently, we investigate whether smoothing in any other form can be probed observationally. We introduce phenomenological smoothing factor e-k2σ2 to the inflationary spectrum and investigate its effects on the spectrum of CMB anisotropies and polarization. We show that smoothing can lead to suppression of high multipoles in the spectrum of the CMB. Based on seven years observations of WMAP satellite we indicate that the present scale of high multipoles suppression is constrained by σ < 3.19 Mpc (95% CL). This corresponds to the constraint σ < 100 μm at the end of inflation. Despite this value is far above the Planck scale, other processes of smoothing can be possibly studied with this constraint, as decoherence or diffusion of primordial perturbations.

Cosmic inflation and the past hypothesis

Synthese ◽  
2007 ◽  
Vol 162 (2) ◽  
pp. 157-165
Author(s):  
Peter Mark Ainsworth
Keyword(s):  
Cosmic Inflation ◽  
The Past ◽  
Past Hypothesis

STRANGE-PULSAR MODELS

1991 ◽  
Vol 06 (27) ◽  
pp. 4769-4830 ◽  
Author(s):  
O.G. BENVENUTO ◽  
J.E. HORVATH ◽  
H. VUCETICH
Keyword(s):  
Quark Matter ◽  
Type Ii ◽  
Strange Matter ◽  
Observational Status ◽  
The Subject

v1.6 We review the theory and observational status of strange-pulsar models. After introduction of the subject, a summary of observational facts about pulsars is presented. The theory of quark matter and strange matter relevant to astrophysical applications is briefly discussed, and applied afterwards to type-II supernova theory and to pulsar models. A discussion of the comparison with observation shows the viability of strange-pulsar models.

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