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Title: Can we observe fuzzballs or firewalls?

Abstract

In the fuzzball paradigm the information paradox is resolved because the black hole is replaced by an object with no horizon. One may therefore ask if observations can distinguish a traditional hole from a fuzzball. We give arguments for why the fuzzball structure should lie close to the horizon; i.e., it should be a ‘tight’ fuzzball. We find: (a) It is very difficult to reflect quanta off the surface of such a fuzzball, mainly because geodesics starting near the horizon radius cannot escape to infinity unless their starting direction is very close to radial. (b) If infalling particles interact with the emerging radiation before they are engulfed by the horizon, then we say that we have a ‘firewall behavior’. Here, we consider several types of interactions, but find no evidence for firewall behavior in any theory that obeys causality. (c) Photons with wavelengths larger than the black hole radius can be scattered off the emerging radiation, but a very small fraction of the backscattered photons will be able to escape back to infinity.

Authors:
 [1];  [1];  [1]
  1. The Ohio State Univ., Columbus, OH (United States). Dept. of Physics
Publication Date:
Research Org.:
The Ohio State Univ., Columbus, OH (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1499185
Grant/Contract Number:  
SC0011726
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2018; Journal Issue: 7; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTRONOMY AND ASTROPHYSICS; Black Holes; Black Holes in String Theory; Models of Quantum Gravity

Citation Formats

Guo, Bin, Hampton, Shaun, and Mathur, Samir D. Can we observe fuzzballs or firewalls?. United States: N. p., 2018. Web. doi:10.1007/jhep07(2018)162.
Guo, Bin, Hampton, Shaun, & Mathur, Samir D. Can we observe fuzzballs or firewalls?. United States. doi:10.1007/jhep07(2018)162.
Guo, Bin, Hampton, Shaun, and Mathur, Samir D. Wed . "Can we observe fuzzballs or firewalls?". United States. doi:10.1007/jhep07(2018)162. https://www.osti.gov/servlets/purl/1499185.
@article{osti_1499185,
title = {Can we observe fuzzballs or firewalls?},
author = {Guo, Bin and Hampton, Shaun and Mathur, Samir D.},
abstractNote = {In the fuzzball paradigm the information paradox is resolved because the black hole is replaced by an object with no horizon. One may therefore ask if observations can distinguish a traditional hole from a fuzzball. We give arguments for why the fuzzball structure should lie close to the horizon; i.e., it should be a ‘tight’ fuzzball. We find: (a) It is very difficult to reflect quanta off the surface of such a fuzzball, mainly because geodesics starting near the horizon radius cannot escape to infinity unless their starting direction is very close to radial. (b) If infalling particles interact with the emerging radiation before they are engulfed by the horizon, then we say that we have a ‘firewall behavior’. Here, we consider several types of interactions, but find no evidence for firewall behavior in any theory that obeys causality. (c) Photons with wavelengths larger than the black hole radius can be scattered off the emerging radiation, but a very small fraction of the backscattered photons will be able to escape back to infinity.},
doi = {10.1007/jhep07(2018)162},
journal = {Journal of High Energy Physics (Online)},
number = 7,
volume = 2018,
place = {United States},
year = {2018},
month = {7}
}

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Cited by: 12 works
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Figures / Tables:

Figure 1 Figure 1: (a) The conventional picture of a black hole. (b) the fuzzball picture: spacetime ends just outside the horizon in a quantum mess.

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Works referenced in this record:

Collisions with black holes and deconfined plasmas
journal, April 2008


Smooth Horizonless Geometries Deep Inside the Black-Hole Regime
journal, November 2016


Nature abhors a horizon
journal, October 2015


Information loss in black holes
journal, October 2005


Possible astrophysical observables of quantum gravity effects near black holes
journal, October 2014

  • Pen, Ue-Li; Broderick, Avery E.
  • Monthly Notices of the Royal Astronomical Society, Vol. 445, Issue 4
  • DOI: 10.1093/mnras/stu1919

Is the Gravitational-Wave Ringdown a Probe of the Event Horizon?
journal, April 2016


Global structure of five-dimensional fuzzballs
journal, December 2013


Particle emission rates from a black hole: Massless particles from an uncharged, nonrotating hole
journal, January 1976


How fast can a Black hole Release its Information?
journal, December 2009


The stretched horizon and black hole complementarity
journal, October 1993


Black holes and beyond
journal, November 2012


Black holes: complementarity or firewalls?
journal, February 2013

  • Almheiri, Ahmed; Marolf, Donald; Polchinski, Joseph
  • Journal of High Energy Physics, Vol. 2013, Issue 2
  • DOI: 10.1007/JHEP02(2013)062

Cool horizons for entangled black holes
journal, August 2013


The flaw in the firewall argument
journal, July 2014


Spacetime has a “thickness”
journal, October 2017


Emission rates, the correspondence principle and the information paradox
journal, September 1998


Breakdown of predictability in gravitational collapse
journal, November 1976


The fuzzball proposal for black holes
journal, October 2008


Gravitational-wave signatures of exotic compact objects and of quantum corrections at the horizon scale
journal, October 2016


Oscillating supertubes and neutral rotating black hole microstates
journal, April 2014


Radiation from the non-extremal fuzzball
journal, June 2008


Absorption cross section of small black holes
journal, December 1976


An infalling observer in AdS/CFT
journal, October 2013

  • Papadodimas, Kyriakos; Raju, Suvrat
  • Journal of High Energy Physics, Vol. 2013, Issue 10
  • DOI: 10.1007/JHEP10(2013)212

Universality of Low Energy Absorption Cross Sections for Black Holes
journal, January 1997


String theory and the principle of black hole complementarity
journal, October 1993


What prevents gravitational collapse in string theory?
journal, October 2016


Echoes from the abyss: Tentative evidence for Planck-scale structure at black hole horizons
journal, October 2017


Soft Hair on Black Holes
journal, June 2016


Tunneling into fuzzball states
journal, June 2009


The fuzzball proposal for black holes: an elementary review
journal, July 2005


Pair creation in non-extremal fuzzball geometries
journal, November 2008


Instability of nonsupersymmetric smooth geometries
journal, March 2006


The information paradox: a pedagogical introduction
journal, October 2009


One ring to rule them all and in the darkness bind them?
journal, January 2005

  • Bena, Iosif; Warner, Nicholas P.
  • Advances in Theoretical and Mathematical Physics, Vol. 9, Issue 5
  • DOI: 10.4310/ATMP.2005.v9.n5.a1

AdS/CFT duality and the black hole information paradox
journal, February 2002


Tidal stresses and energy gaps in microstate geometries
journal, February 2018

  • Tyukov, Alexander; Walker, Robert; Warner, Nicholas P.
  • Journal of High Energy Physics, Vol. 2018, Issue 2
  • DOI: 10.1007/JHEP02(2018)122

Particle creation by black holes
journal, August 1975

  • Hawking, S. W.
  • Communications In Mathematical Physics, Vol. 43, Issue 3
  • DOI: 10.1007/BF02345020

Nonviolent information transfer from black holes: A field theory parametrization
journal, July 2013


Non-extremal fuzzballs and ergoregion emission
journal, January 2009


General Relativistic Fluid Spheres
journal, November 1959


Tunneling into microstate geometries: quantum effects stop gravitational collapse
journal, July 2016

  • Bena, Iosif; Mayerson, Daniel R.; Puhm, Andrea
  • Journal of High Energy Physics, Vol. 2016, Issue 7
  • DOI: 10.1007/JHEP07(2016)031

Correlations in Hawking radiation and the infall problem
journal, September 2011

  • Mathur, Samir D.; Plumberg, Christopher J.
  • Journal of High Energy Physics, Vol. 2011, Issue 9
  • DOI: 10.1007/JHEP09(2011)093

    Works referencing / citing this record:

    Testing the nature of dark compact objects: a status report
    journal, July 2019


    Are quantum corrections on horizon scale physically motivated?
    journal, October 2019


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