Stringy black hole interiors

• Published in: Journal of High Energy Physics
• Main Authors: Amit Giveon, Nissan Itzhaki
• Format: Article
• Language: English
• Published: SpringerOpen 2019-11-01
• Subjects: 2D Gravity; Black Holes; Black Holes in String Theory
• Online Access: http://link.springer.com/article/10.1007/JHEP11(2019)014

Abstract It is well known that non-perturbative α ′ corrections to the SL(2, ℝ)/U(1) cigar geometry are described via a condensation of a Sine-Liouville operator that schematically can be written as W + + W − , where W ± describe a string with winding number ±1. This condensation leads to interesting effects in the cigar geometry that take place already at the classical level in string theory. Condensation of the analytically continued Sine-Liouville operator in the Lorentzian SL(2, ℝ)/U(1) black hole is problematic. Here, we propose that in the black hole case, the non-perturbative α ′ corrections are described in terms of an operator that can be viewed as the analytic continuation of the fusion of W + and W − . We show that this operator does not suffer from the same problem as the analytically continued Sine-Liouville operator and argue that it describes folded strings that fill the entire black hole and, in a sense, replace the black hole interior. We estimate the folded strings radiation, and show that they radiate at the Hawking temperature.