ISCOs in AdS/CFT

David Berenstein , Ziyi Li, Joan Simon

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

We study stable circular orbits in spherically symmetric AdS black holes in various dimensions and their limiting innermost stable circular orbits (ISCOs). We provide analytic expressions for their size, angular velocity and angular momentum in a large black hole mass regime. The dual interpretation is in terms of meta-stable states not thermalising in typical thermal scales and whose existence is due to non-perturbative effects on the spatial curvature. Our calculations reproduce the binding energy known in the literature, but also include a binding energy in the radial fluctuations corresponding to near circular trajectories. We also describe how particles are placed on these orbits from integrated operators on the boundary: they tunnel inside in a way that can be computed from both complex geodesics in the black hole background and from the WKB approximation of the wave equation. We explain how these two computations are related.
Original languageEnglish
Article number045009
Number of pages18
JournalClassical and quantum gravity
Volume38
Issue number4
DOIs
Publication statusPublished - 23 Dec 2020

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