Expanding the black hole interior: partially entangled thermal states in SYK

Akash Goel, Ho Tat Lam, Gustavo J. Turiaci, Herman Verlinde

Research output: Contribution to journalArticlepeer-review

59 Scopus citations


We introduce a family of partially entangled thermal states in the SYK model that interpolates between the thermo-field double state and a pure (product) state. The states are prepared by a euclidean path integral describing the evolution over two euclidean time segments separated by a local scaling operator O. We argue that the holographic dual of this class of states consists of two black holes with their interior regions connected via a domain wall, described by the worldline of a massive particle. We compute the size of the interior region and the entanglement entropy as a function of the scale dimension of O and the temperature of each black hole. We argue that the one-sided bulk reconstruction can access the interior region of the black hole.

Original languageEnglish (US)
Article number156
JournalJournal of High Energy Physics
Issue number2
StatePublished - Feb 1 2019

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


  • 2D Gravity
  • AdS-CFT Correspondence
  • Models of Quantum Gravity


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