Analytic expressions for quasinormal modes and grey-body factors in the eikonal limit and beyond

@article{76341,
   author = {Konoplya, Roman and Zhidenko, A.},
   article_location = {GB - Spojené království Velké Británie a},
   article_number = {24},
   doi = {http://dx.doi.org/10.1088/1361-6382/ad0a52},
   keywords = {quasinormal modes;transmission coefficients;grey-body factor;WKB formula;eikonal approximation},
   language = {eng},
   issn = {0264-9381},
   journal = {Classical and Quantum Gravity},
   title = {Analytic expressions for quasinormal modes and grey-body factors in the eikonal limit and beyond},
   url = {https://iopscience.iop.org/article/10.1088/1361-6382/ad0a52},
   volume = {40},
   year = {2023}
}

TY  - JOUR
ID  - 76341
AU  - Konoplya, Roman - Zhidenko, A.
PY  - 2023
TI  - Analytic expressions for quasinormal modes and grey-body factors in the eikonal limit and beyond
JF  - Classical and Quantum Gravity
VL  - 40
IS  - 24
SP  - "245005-1"-"245005-16"
EP  - "245005-1"-"245005-16"
SN  - 02649381
KW  - quasinormal modes;transmission coefficients;grey-body factor;WKB formula;eikonal approximation
UR  - https://iopscience.iop.org/article/10.1088/1361-6382/ad0a52
N2  - Although the WKB series converges only asymptotically and guarantees the exact result solely in the eikonal regime, we have managed to derive concise analytical expressions for the quasinormal modes and grey-body factors of black holes, expanding beyond the eikonal approximation. Remarkably, these expressions demonstrate unexpectedly strong accuracy. We suggest a comprehensive approach for deriving analytical expressions for grey-body factors and quasinormal modes at various orders beyond the eikonal approximation. Two cases are examined as examples: the Schwarzschild-de Sitter black hole and hairy black holes within the framework of Effective Field Theory. We have publicly shared a generic code that calculates analytical expressions for grey-body factors and quasinormal modes of spherical black holes.
ER  - 

KONOPLYA, Roman and A. ZHIDENKO. Analytic expressions for quasinormal modes and grey-body factors in the eikonal limit and beyond. \textit{Classical and Quantum Gravity}. GB - Spojené království Velké Británie a, 2023, vol.~40, No~24, p.~''245005-1''-''245005-16'', 16 pp. ISSN~0264-9381. Available from: https://dx.doi.org/10.1088/1361-6382/ad0a52.