Properties of asymptotically flat two-dimensional black holes

Abstract

The authors investigate properties of two-dimensional asymptotically flat black holes which arise in both string theory and in scale invariant theories of gravity. By introducing matter sources in the field equations they show how such objects can arise as the endpoint of gravitational collapse. They also investigate the thermodynamic and quantum properties, which give rise to a fundamental length scale. The 't Hooft prescription for cutting off eigenmodes of particle wavefunctions is shown to be source dependent, unlike the four-dimensional case. The relationship between these black holes and those considered previously in (1+1) dimensions is discussed.