A Stringy Effect on Hawking Radiation

TL;DR

This paper explores how string theory's suppressed interactions at high energies influence Hawking radiation, revealing a Lorentz-invariant UV/IR relation that may turn off radiation near black hole scrambling time.

Contribution

It introduces a Lorentz-invariant UV/IR relation in string-inspired quantum field theories that impacts black hole radiation dynamics.

Findings

Hawking radiation is suppressed around the scrambling time.

A Lorentz-invariant UV/IR relation consistent with the spacetime uncertainty principle is identified.

String interactions at high energies exhibit exponential suppression.

Abstract

In string theories, interactions are exponentially suppressed for trans-Planckian space-like external momenta. We study a class of quantum field theories that exhibit this feature modeled after Witten's bosonic open string field theory, and discover a Lorentz-invariant UV/IR relation that leads to the spacetime uncertainty principle proposed by Yoneya. Application to a dynamical black hole background suggests that Hawking radiation is turned off around the scrambling time.