100 citations · 432 across the 11 of their papers we have counts for
11 papers
Analytic formula for quasinormal modes in the near-extreme Kerr-Newman-de Sitter spacetime governed by a non-Pöschl-Teller potential
M. S. Churilova, R. A. Konoplya, A. Zhidenko
Quasinormal modes of scalar, electromagnetic, and gravitational fields in the extreme Schwarzschild-de Sitter background are known to be expressed in analytic form as eigenvalues o…
Wormholes without exotic matter: quasinormal modes, echoes and shadows
M. S. Churilova, R. A. Konoplya, Z. Stuchlik +1
An analytical solution representing traversable asymptotically flat and symmetric wormholes was obtained without adding exotic matter in two different theories independently: in th…
Quasinormal modes of the Dirac field in the novel 4D Einstein-Gauss-Bonnet gravity
M. S. Churilova
While quasinormal modes of bosonic fields for the non-trivial -dimensional Einstein-Gauss-Bonnet theory of gravity suggested in [D.~Glavan and C.~Lin, Phys.\ Rev.\ Lett.\ {\bf 1…
Quasinormal modes of the test fields in the novel 4D Einstein-Gauss-Bonnet-de Sitter gravity
M. S. Churilova
The regularization proposed in [D.~Glavan and C.~Lin, Phys.\ Rev.\ Lett.\ {\bf 124}, 081301 (2020)] led to the black hole solutions which turned out to be the solutions of the cons…
Non-evident stability of a Dirac field in Schwarzschild-de Sitter spacetime
R. A. Konoplya, M. S. Churilova
Perturbations of the Dirac field in the Schwarzschild spacetime are characterized by two wave equations (for two chiralities) with effective potentials which are iso-spectral and o…
Accelerated expansion of the universe from the perspective of inhomogeneous cosmology
I. Bormotova, E. Kopteva, M. Churilova +1
We present a special case of the Stephani solution with spherical symmetry while considering different values of spatial curvature. We investigate the dynamics of the universe evol…
Black holes in Einstein-aether theory: Quasinormal modes and time-domain evolution
M. S. Churilova
We propose accurate calculations of quasinormal modes of black holes in the Einstein-aether theory, which were previously considered in the literature, partially, with insufficient…
Accelerated Expansion of the Universe in the Model with Non-Uniform Pressure
Elena Kopteva, Irina Bormotova, Maria Churilova +1
We present the particular case of the Stephani solution for shear-free perfect fluid with uniform energy density and non-uniform pressure. Such models appeared as possible alternat…
Ringing of the regular black-hole/wormhole transition
M. S. Churilova, Z. Stuchlik
A simple one-parameter generalization of the Schwarzschild spacetime was recently suggested by A. Simpson and M. Visser [JCAP 1902, 042 (2019)] as a toy model describing the regula…
Arbitrarily long-lived quasinormal modes in a wormhole background
M. S. Churilova, R. A. Konoplya, A. Zhidenko
Arbitrarily long lived modes, called quasi-resonances, are known to exist in the spectrum of massive fields for a number of black-hole backgrounds at some discrete values of mass o…
Analytical quasinormal modes of spherically symmetric black holes in the eikonal regime
M. S. Churilova
Quasinormal modes in the high frequency (eikonal) regime can be obtained analytically as the Mashhoon-Will-Schiutz WKB formula is exact in this case. This regime is interesting bec…