Black hole collision with a scalar particle in three dimensional anti-de Sitter spacetime

TL;DR

This paper investigates the dynamics of a BTZ black hole colliding with a scalar particle in AdS3, analyzing gravitational radiation, quasinormal modes, and the dual CFT thermalization process.

Contribution

It provides the first detailed computation of waveforms, energy radiation, and quasinormal ringing in a black hole-scalar particle collision within AdS3.

Findings

Late-time signals dominated by quasinormal ringing

Quantitative estimates of energy radiated during collision

Mapping of bulk process to thermalization in dual CFT

Abstract

We study the collision between a BTZ black hole and a test particle coupled to a scalar field. We compute the power spectrum, the energy radiated and the plunging waveforms for this process. We show that for late times the signal is dominated by the quasinormal ringing. In terms of the AdS/CFT correspondence the bulk gravity process maps into a thermal state, an expanding bubble and gauge particles decaying into bosons of the associated operator. These latter thermalize in a timescale predicted by the bulk theory.