Holographic thermal spectral functions factorize exactly into OPE and non-perturbative pieces whose large-momentum transseries expansion, obtained via exact WKB, directly encodes black hole singularity information in boundary observables even at finite momentum.
The Black hole singularity in AdS / CFT
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Exact holographic thermal spectral functions: OPE, non-perturbative corrections, and black hole singularity
Holographic thermal spectral functions factorize exactly into OPE and non-perturbative pieces whose large-momentum transseries expansion, obtained via exact WKB, directly encodes black hole singularity information in boundary observables even at finite momentum.