The fuzzball proposal for black holes

  title={The fuzzball proposal for black holes},
  author={Kostas Skenderis and Marika Taylor},
  journal={Physics Reports},
The fuzzball nature of two-charge black hole microstates
Critique of the fuzzball program
We explore the viability of fuzzballs as candidate microstate geometries for the black hole, and their possible role in resolutions of the information paradox. We argue that if fuzzballs provide a
Unitarity and fuzzball complementarity: “Alice fuzzes but may not even know it!”
A bstractWe investigate the recent black hole firewall argument. For a black hole in a typical state we argue that unitarity requires every quantum of radiation leaving the black hole to carry
An infalling observer in AdS/CFT
A bstractWe describe the experience of an observer falling into a black hole using the AdS/CFT correspondence. In order to do this, we reconstruct the local bulk operators measured by the observer
I review some of the concepts at the crossroads of gravitational thermodynamics, holography and quantum mechanics. First, the origin of gravitational thermodynamics due to coarse graining of quantum
Unwinding of strings thrown into a fuzzball
The traditional black hole has a horizon, with a singularity inside the horizon. But actual microstates of black holes are ‘fuzzballs’, with no horizon and a complex internal structure. We take the
Black-Hole Microstates in String Theory : Black is the Color but Smooth are the Geometries?
Black holes are produced by gravitational collapse of supermassive stars and consist of a spacetime singularity dressed by a horizon from which nothing can escape. They lie at the common theoretical
New instability of non-extremal black holes: spitting out supertubes
A bstractWe search for stable bound states of non-extremal rotating three-charge black holes in five dimensions (Cvetic-Youm black holes) and supertubes. We do this by studying the potential of
Non-extremal black hole microstates: fuzzballs of fire or fuzzballs of fuzz?
A bstractWe construct the first family of microstate geometries of near-extremal black holes, by placing metastable supertube probes inside certain scaling supersymmetric smooth microstate
Comments on black holes I: the possibility of complementarity
A bstractWe comment on a recent paper of Almheiri, Marolf, Polchinski and Sully who argue against black hole complementarity based on the claim that an infalling observer ‘burns’ as he attempts to


Radiation from the non-extremal fuzzball
The fuzzball proposal says that the information of the black hole state is distributed throughout the interior of the horizon in a ‘quantum fuzz’. There are special microstates where in the dual CFT
Black hole size and phase space volumes
For extremal black holes the fuzzball conjecture says that the throat of the geometry ends in a quantum `fuzz', instead of being infinite in length with a horizon at the end. For the D1-D5 system we
The Scattering Matrix Approach for the Quantum Black Hole an Overview
If one assumes the validity of conventional quantum field theory in the vicinity of the horizon of a black hole, one does not find a quantum mechanical description of the entire black hole that even
Black holes and branes in string theory
This is a set of introductory lecture notes on black holes in string the- ory. After reviewing some aspects of string theory such as dualities, brane solutions, supersymmetric and non-extremal
Holographic anatomy of fuzzballs
We present a comprehensive analysis of 2-charge fuzzball solutions, that is, horizon-free non-singular solutions of IIB supergravity characterized by a curve on R4. We propose a precise map that
Fuzzball solutions for black holes and D1-brane-D5-brane microstates.
The holographic 1-point functions of the fuzzball solutions are computed and it is found that charged chiral primaries have nonzero expectation values, except when the curve characterizing the solution is circular.
Massless black holes and black rings as effective geometries of the D1–D5 system
We compute correlation functions in the AdS3/CFT2 correspondence to study the emergence of effective spacetime geometries describing complex underlying microstates. The basic argument is that almost