On certain cosmological relics of the early string dynamics

TL;DR

This paper explores how early string dynamics can leave cosmological relics, such as spatial isotropy and gravitational wave imprints, offering new insights into cosmological problems without relying on inflation.

Contribution

It demonstrates that relics from early string dynamics can address cosmological issues and suggests new perspectives on cosmic mixing and structure formation.

Findings

Spatial isotropy as a relic of string dynamics

Imprints of primordial gravitational waves on CMB structure

Absence of horizon problem without inflation due to mixmaster dynamics

Abstract

The tracing of cosmological relics from the early string dynamics may enhance the theory and provide new perspectives on the major cosmological problems. This point is illustrated in a leading-order Bianchi-type $VII_0$ string background, wherein spatial isotropy can be claimed as such a relic. A much finer one, descending from a premordial gravitational wave, could be retrieved from its imprint on the small-scale structure of the cosmic microwave background. In spite of the absence of conventional inflation, there is no horizon problem thanks to the presence of an equally fundamental mixmaster dynamics. Implications and certain new perspectives which thus arise for the more general problem of cosmological mixing are briefly discussed.