IAS Fundamental Physics Seminar Series - More Scalings from Cosmic Strings

Abstract
In this talk, the speaker will discuss his recent analysis of all individual cosmic strings of various lengths in a large ensemble of the global cosmic string networks in the post-inflationary scenario, obtained from numerical simulations. Strong evidence for a logarithmically growing spectral index of the string power spectrum during the evolution is newly reported as his main result. An analytic relation between two power spectra of cosmic strings and axions, which should be valid under some assumptions, will be discussed. The speaker argues that his analytic result strongly supports the correlated spectra of cosmic strings and axions.