Triggered superradiance and fast radio bursts

TL;DR

This paper proposes a model for fast radio bursts based on triggered superradiance, explaining their properties and matching observed data, including pulse narrowing and spectral bandwidth scaling.

Contribution

It introduces a triggered superradiance model for FRBs that accounts for their temporal and spectral features, aligning well with observed data.

Findings

Model matches light curves of FRB 110220 and FRB 121102.

Explains pulse narrowing with increasing frequency.

Predicts spectral bandwidth scaling consistent with observations.

Abstract

In this paper we develop a model for fast radio bursts (FRBs) based on triggered superradiance (SR) and apply it to previously published data of FRB 110220 and FRB 121102. We show how a young pulsar located at ~100 pc or more from an SR/FRB system could initiate the onset of a powerful burst of radiation detectable over cosmological distances. Our models using the OH$^2\Pi_{3/2}$ $\left(J=3/2\right)$ 1612 MHz and $^2\Pi_{3/2}$ $\left(J=5/2\right)$ 6030 MHz spectral lines match the light curves well and suggest the entanglement of more than $10^{30}$ initially inverted molecules over lengths of approximately 300 au for a single SR sample. SR also accounts for the observed temporal narrowing of FRB pulses with increasing frequency for FRB 121102, and predicts a scaling of the FRB spectral bandwidth with the frequency of observation, which we found to be consistent with the existing data.