The study of reionization history plays an important role in understanding the evolution of our universe.It is commonly believed that the intergalactic medi
A characteristic signature of the string gas cosmology is to predict primordial power spectra with a red scalar but a blue tensor tilt.Nevertheless,this fea
The detection of the magnetic type B-mode polarization is the main goal of future cosmic microwave background(CMB)experiments.In the standard model,the B-mo