Volume complexity for Janus AdS3 geometries

Roberto Auzzi, Stefano Baiguera, Sara Bonansea, Giuseppe Nardelli, Kristian Toccacelo

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


We investigate the complexity=volume proposal in the case of Janus AdS3 geometries, both at zero and finite temperature. The leading contribution coming from the Janus interface is a logarithmic divergence, whose coefficient is a function of the dilaton excursion. In the presence of the defect, complexity is no longer topological and becomes temperature-dependent. We also study the time evolution of the extremal volume for the time-dependent Janus BTZ black hole. This background is not dual to an interface but to a pair of entangled CFTs with different values of the couplings. At late times, when the equilibrium is restored, the couplings of the CFTs do not influence the complexity rate. On the contrary, the complexity rate for the out-of-equilibrium system is always smaller compared to the pure BTZ black hole background.

Original languageEnglish
Article number45
JournalJournal of High Energy Physics
Issue number8
StatePublished - 1 Aug 2021
Externally publishedYes


  • AdS-CFT Correspondence
  • Black Holes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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