Exciting gauge field and gravitons in a brane-anti-brane annihilation

TL;DR

This paper explores how tachyon condensation during brane-anti-brane annihilation in a cosmological context leads to explosive production of gauge fields and gravitational waves, impacting early universe dynamics.

Contribution

It demonstrates the inevitability of gauge and gravity wave production during tachyon condensation in brane inflation scenarios, highlighting the role of tachyonic instability.

Findings

Explosive gauge field and gravity wave production during tachyon condensation.

Tachyonic instability fragments the tachyon and excites gauge fields.

Generated stress energy contributes to gravitational wave signals.

Abstract

In this paper we point out the inevitability of an explosive production of gauge field and gravity wave during an open string tachyon condensation in a cosmological setting. We will be particularly studying an example of brane-anti-brane inflation in a warped throat where inflation ends via tachyon condensation. We point out that a tachyonic instability helps fragmenting the homogeneous tachyon and excites gauge field and contributes to the stress energy tensor which also feeds into the gravity waves.