Looking inside a black hole

Alexander R.H. Smith, Robert B. Mann

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


The cosmic censorship conjecture posits that singularities forming to the future of a regular Cauchy surface are hidden by an event horizon. Consequently any topological structures will ultimately collapse within the horizon of a black hole and so no observer can actively probe them classically. We consider here a quantum analogue of this problem, in which we compare the transition rates of an Unruh-DeWitt detector placed outside the horizon of an eternal BTZ black hole and its associated geon counterpart. We find the transition rates differ, with the latter being time-dependent, implying that we are indeed able to probe the structure of the singularity from outside the horizon.

Original languageEnglish
Article number082001
Pages (from-to)1-8
Number of pages8
JournalClassical and Quantum Gravity
Issue number8
Publication statusPublished - 21 Apr 2014
Externally publishedYes


  • quantum field theory
  • Unruh–DeWitt detector
  • general relativity
  • geon


Dive into the research topics of 'Looking inside a black hole'. Together they form a unique fingerprint.

Cite this