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- W2062532457 abstract "We study the dynamical evolution of a scalar field coupling to Einstein's tensor in the background of a Reissner-Nordstrom black hole. Our results show that the coupling constant $ensuremath{eta}$ imprints in the wave dynamics of a scalar perturbation. In the weak coupling, we find that with the increase of the coupling constant $ensuremath{eta}$ the real parts of the fundamental quasinormal frequencies decrease and the absolute values of imaginary parts increase for fixed charge $q$ and multipole number $l$. In the strong coupling, we find that for $lensuremath{ne}0$ the instability occurs when $ensuremath{eta}$ is larger than a certain threshold value ${ensuremath{eta}}_{c}$ which deceases with the multipole number $l$ and charge $q$. However, for the lowest $l=0$, we find that there does not exist such a threshold value and the scalar field always decays for arbitrary coupling constant." @default.
- W2062532457 created "2016-06-24" @default.
- W2062532457 creator A5058364593 @default.
- W2062532457 creator A5072186442 @default.
- W2062532457 date "2010-10-06" @default.
- W2062532457 modified "2023-10-05" @default.
- W2062532457 title "Dynamical evolution of a scalar field coupling to Einstein’s tensor in the Reissner-Nordström black hole spacetime" @default.
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- W2062532457 doi "https://doi.org/10.1103/physrevd.82.084006" @default.
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