English

Nature abhors a horizon

High Energy Physics - Theory 2016-01-18 v2 General Relativity and Quantum Cosmology

Abstract

The information paradox can be resolved if we recognize that the wavefunctional in gravity Ψ[g]\Psi[g] should be considered on the {\it whole} of superspace, the space of possible gg. The largeness of the Bekenstein entropy implies a vast space of gravitational solutions, which are conjectured to be fuzzball configurations. In the WKB approximation, the wavefunctional for a collapsing shell is oscillatory in a small region of superspace, and the classical approximation picks out this part. But the wavefunctional will be damped (`under the barrier') in the remainder of this vast superspace. We perform a simple computation to show that at the threshold of black hole formation, the barrier is lowered enough to make the latter part oscillatory; this alters the classical evolution and avoids horizon formation.

Keywords

Cite

@article{arxiv.1505.05078,
  title  = {Nature abhors a horizon},
  author = {Per Kraus and Samir D. Mathur},
  journal= {arXiv preprint arXiv:1505.05078},
  year   = {2016}
}

Comments

7 pages, 3 figures, Essay awarded third prize in the Gravity Research Foundation 2015 essay competition (some typographical errors corrected)

R2 v1 2026-06-22T09:37:21.621Z