Gravitational waves (GWs) have a great potential to probe cosmology. We review early
universe sources that can lead to cosmological backgrounds of GWs. We begin by …

From recent observational data two significant directions have been made in the field of
theoretical cosmology recently. First, we are now able to make use of present observations …

Inspired by the chromo-natural inflation model of Adshead&Wyman, we reshape its scalar
content to relax the tension with current observational bounds. Besides an inflaton, the setup …

In light of the recent BICEP2 B-mode polarization detection, which implies a large
inflationary tensor-to-scalar ratio r 0.05= 0. 2− 0.05+ 0.07, we re-examine the evidence for …

We constrain anisotropic cosmic birefringence using four-point correlations of even-parity E-
mode and odd-parity B-mode polarization in the cosmic microwave background …

arxiv:1506.04039v2 [astro-ph.CO] 19 Jun 2015 Page 1 Cosmic strings∗ Tanmay Vachaspati,1,
† Levon Pogosian,2, ‡ and Dani`ele A. Steer3, 4, 5, § 1Physics Department, Arizona State …

We investigate the implications for inflation of the detection of B-modes polarization in the
cosmic microwave background by BICEP2. We show that the hypothesis of the primordial …

We explore conformal-anomaly driven inflation in F (R) gravity without invoking the scalar-
tensor representation. We derive the stress-energy tensor of the quantum anomaly in the flat …

ABSTRACT A detection of excess cosmic microwave background (CMB) B-mode
polarization on large scales allows the possibility of measuring not only the amplitude of …

We report on the energy-momentum correlators obtained with recent numerical simulations
of the Abelian Higgs model, essential for the computation of cosmic microwave background …