Author

J. Rayimbaev

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Preprint Sep 2026

Ringdown and greybody signatures of rational regular black holes in non-polynomial gravity

We study the quasinormal mode spectrum and wave-scattering properties of the four-dimensional rational regular black hole recently obtained in non-polynomial (quasi-topological) gravity. Using third-order WKB together with two independent cross-checks a Frobenius--Riccati shooting method and a time-domain evolution we...

Shohzod Jumaniyozov, J. Rayimbaev, Azam Payzullaev et al. · 0 citations

Preprint Oct 2026

Boundary-induced corrections to the response of an Unruh-DeWitt detector outside a compact star with Robin surface conditions

We formulate the finite-time response problem for a radially accelerated Unruh--DeWitt detector coupled to a real massless scalar field outside a static, spherically symmetric, horizonless compact star. The stellar exterior is described by the Schwarzschild geometry, while unresolved field--surface interactions are rep...

Nodirbek Anarboev, J. Khasanov, J. Rayimbaev et al. · 0 citations