Scenario for Seeding a Singularity in $d = 2$ String Black Hole with Tachyon

TL;DR

This paper proposes a scenario where a $d=2$ string black hole can evolve into a singular solution due to tachyon-induced discontinuities, suggesting black holes may end as massive remnants.

Contribution

It introduces a plausible evolution scenario from black hole to singular solution in $d=2$ string theory involving tachyon effects.

Findings

Black hole can evolve into a singular solution with tachyon influence

Discontinuity in dilaton seeded by tachyon pulse facilitates evolution

Black hole may become a massive remnant as an end state

Abstract

The $d = 2$ string admits a black hole solution and also a singular solution when tachyon back reaction is included. It is of importance to know if the former solution can evolve into a later one. An explicit solution describing this process is difficult to obtain. We present here a scenario in which such an evolution is very likely to occur. In essence, it takes place when a derivative discontinuity is seeded in the dilaton field by an incident tachyon pulse. An application of this scenario to $1 + 1$ dimensional toy models suggests that a black hole can evolve into a massive remnant, strengthening its candidacy for the end state of a black hole.