Smooth horizonless geometries deep inside the black-hole regime

Iosif Bena (1) , Stefano Giusto (2) , Emil J. Martinec (3) , Rodolfo Russo (4) , Masaki Shigemori (5) , David Turton (1) , Nicholas P. Warner (6)

1 IPHT - Institut de Physique Théorique - UMR CNRS 3681
2 DFA - Dipartimento di Fisica ed Astronomia
3 Enrico Fermi Institute
4 QMUL - Queen Mary University of London
5 YITP - Yukawa Institute for Theoretical Physics
6 USC - University of Southern California

We construct the first family of horizonless supergravity solutions that have the same mass, charges and angular momenta as general supersymmetric rotating D1-D5-P black holes in five dimensions. This family includes solutions with arbitrarily small angular momenta, deep within the regime of quantum numbers and couplings for which a large classical black hole exists. These geometries are well-approximated by the black-hole solution, and in particular exhibit the same near-horizon throat. Deep in this throat, the black-hole singularity is resolved into a smooth cap. We also identify the holographically-dual states in the N=(4,4) D1-D5 orbifold CFT. Our solutions are among the states counted by the CFT elliptic genus, and provide examples of smooth microstate geometries within the ensemble of supersymmetric black-hole microstates.

Domains: General Relativity and Quantum Cosmology [gr-qc]

Iosif Bena, Stefano Giusto, Emil J. Martinec, Rodolfo Russo, Masaki Shigemori, et al.. Smooth horizonless geometries deep inside the black-hole regime. Physical Review Letters, 2016, 117, pp.201601. ⟨10.1103/PhysRevLett.117.201601⟩. ⟨cea-01507729⟩