Evanescent black holes

Curtis Gove Callan, Steven B. Giddings, Jeffrey A. Harvey, Andrew Strominger

Research output: Contribution to journalArticlepeer-review

984 Scopus citations


A renormalizable theory of quantum gravity coupled to a dilaton and conformal matter in two spacetime dimensions is analyzed. The theory is shown to be exactly solvable classically. Included among the exact classical solutions are configurations describing the formation of a black hole by collapsing matter. The problem of Hawking radiation and back reaction of the metric is analyzed to leading order in a 1N expansion, where N is the number of matter fields. The results suggest that the collapsing matter radiates away all of its energy before an event horizon has a chance to form, and black holes thereby disappear from the quantum-mechanical spectrum. It is argued that the matter asymptotically approaches a zero-energy "bound state" which can carry global quantum numbers and that a unitary S matrix including such states should exist.

Original languageEnglish (US)
Pages (from-to)R1005-R1009
JournalPhysical Review D
Issue number4
StatePublished - 1992

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Evanescent black holes'. Together they form a unique fingerprint.

Cite this