https://doi.org/10.1140/epjc/s10052-025-15104-x
Regular Article - Theoretical Physics
Revisiting Schwarzschild black hole singularity through string theory
1
College of Physics, Sichuan University, 610065, Chengdu, China
2
DAMTP, Centre for Mathematical Sciences, University of Cambridge, CB3 0WA, Cambridge, UK
3
Department of Physics, Chongqing University, 401331, Chongqing, China
a
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Received:
5
August
2025
Accepted:
20
November
2025
Published online:
6
February
2026
Abstract
In this letter, we derive the singular condition for black holes and demonstrate the potential resolution of the Schwarzschild black hole singularity in general relativity using non-perturbative 
corrections of string theory. This work is motivated by the Belinskii, Khalatnikov and Lifshitz (BKL) proposal, which suggests that the structure of the black hole interior in vacuum Einstein’s equations can be transformed into the Kasner universe near the singularity. This transformation allows for the description of the black hole interior using the 
invariant anisotropic Hohm–Zwiebach action, which includes all orders of corrections.
© The Author(s) 2026
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