Evaporation of a two-dimensional charged black hole

Abstract

We construct a dilatonic two-dimensional model of a charged black hole. The classical solution is a static charged black hole, characterized by two parameters, $m$ and $q$, representing the black hole's mass and charge. Then we study the semiclassical effects, and calculate the evaporation rate of both $m$ and $q$, as a function of these two quantities. Analyzing this dynamical system, we find two qualitatively different regimes, depending on the electromagnetic coupling constant $g_A$. If the latter is greater than a certain critical value, the charge-to-mass ratio decays to zero upon evaporation. On the other hand, for $g_A$ smaller than the critical value, the charge-to-mass ratio approaches a non-zero constant that depends on $g_A$ but not on the initial values of $m$ and $q$.

Latex, 30 pages, accepted for publication in Phys. Rev. D

References in corpus (1)

• Evaporation of near-extremal Reissner-Nordstrom black holes

Cited by in corpus (7)

• Dilaton Gravity in Two Dimensions
• Global geometry of two-dimensional charged black holes
• Black hole complementarity with local horizons and Horowitz-Maldacena's proposal
• Approximate solution to the CGHS field equations for two-dimensional evaporating black holes
• A Simplified Mathematical Model for the Formation of Null Singularities Inside Black Holes I - Basic Formulation and a Conjecture
• Finite-mass correction to 2D Black-hole evaporation rate
• Constraints in two-dimensional Dilaton Gravity with Fermions