Strings near BTZ black holes: A Carrollian Chronicle
arXiv:2510.16104 · doi:10.1007/JHEP02(2026)152
Abstract
The BTZ black hole provides a tractable (2+1)-dimensional example for investigating string dynamics in curved spacetime. However, a systematic and robust analysis of the solution space of strings in the near-horizon region of BTZ black holes remains elusive in the literature. This work aims to fill this gap by employing the string-Carroll expansion. This formalism provides a natural setting for working with the near-horizon region, because near-horizon expansions for non-extremal black holes match string-Carroll expansions. Using this formalism, and expanding the string action and pullback fields in powers of an effective speed of light, we study the dynamics of closed bosonic strings in the near-horizon, non-extremal BTZ spacetime. Our approach classifies the general characteristics and further reveals some novel features of the families of string solutions.
50 pages, 9 figures, version to appear in JHEP
References in corpus (27)
- The BMS/GCA correspondence
- Conformal Carroll groups and BMS symmetry
- Carrollian Perspective on Celestial Holography
- Flat Holography: Aspects of the dual field theory
- Entropy of three-dimensional asymptotically flat cosmological solutions
- Flat-Space Chiral Gravity
- Bridging Carrollian and Celestial Holography
- Fractons, dipole symmetries and curved spacetime
- Carroll Expansion of General Relativity
- AdS Witten Diagrams to Carrollian Correlators
- Magic Fermions: Carroll and Flat Bands
- Solitons and AdS String Solutions
- Carroll/fracton particles and their correspondence
- A BMS-invariant free scalar model
- Carrollian Origins of Bjorken Flow
- A Rindler Road to Carrollian Worldsheets
- Unification of Decoupling Limits in String and M-theory
- Nonrelativistic Approximations of Closed Bosonic String Theory
- Worldsheet Formalism for Decoupling Limits in String Theory
- Heavy-ion collisions, Gubser flow, and Carroll hydrodynamics
- Horizon Strings as 3d Black Hole Microstates
- Flat Bands and Compact Localised States: A Carrollian roadmap
- Towards Quantizing Null p-branes: Light-Cone Gauge Analysis and Physical Hilbert Space
- de Sitter Holography and Carrollian Brane Theories
- Hydrodynamics in the Carrollian regime
- Strings, Virasoro Sandwiches and Worldsheet Horizons
- Non-extremal near-horizon geometries