Cosmic superstring trajectories in warped compactifications

TL;DR

This paper investigates the motion of cosmic superstrings in warped compactifications, revealing they do not localize at the throat tip and have significant internal motion, affecting gravitational wave signals.

Contribution

It demonstrates that cosmic superstrings in warped geometries do not localize at the tip, maintaining internal motion that influences gravitational wave emissions.

Findings

Strings explore both internal and external dimensions equally.

No mechanism confines strings at the throat tip.

Internal motion suppresses gravitational wave signals.

Abstract

We explore the generic motion of cosmic (super)strings when the internal compact dimensions are warped, using the Klebanov-Strassler solution as a prototypical throat geometry. We find that there is no dynamical mechanism which localises the string at the tip of the throat, but rather that the motion seems to explore both internal and external degrees of freedom democratically. This indicates that cosmic (super)strings formed by inflationary brane-antibrane annihilation will have sufficient internal motion for the gravitational wave signals from the string network to be suppressed relative to the signal from a `standard' cosmic string network.