Matches in SemOpenAlex for { <https://semopenalex.org/work/W2065756867> ?p ?o ?g. }
- W2065756867 abstract "We study the linear stability of dynamical, quadratic gravity, focusing on two particular subclasses (the even-parity sector, exemplified by Einstein-Dilaton-Gauss-Bonnet gravity, and the odd-parity sector, exemplified by dynamical Chern-Simons modified gravity) in the high-frequency, geometric optics approximation. This analysis is carried out by studying gravitational and scalar modes propagating on spherically symmetric and axially symmetric, vacuum solutions of the theory and finding the associated dispersion relations. These relations are solved in two separate cases (the scalar regime and the gravitational wave regime, defined by requiring the ratio of the amplitude of the perturbations to be much greater or smaller than unity) and found in both cases to not lead to exponential growth of the propagating modes, suggesting linearly stability. The modes are found to propagate at subluminal and superluminal speeds, depending on the propagating modes' direction relative to the background geometry, just as in dynamical Chern-Simons gravity." @default.
- W2065756867 created "2016-06-24" @default.
- W2065756867 creator A5052196996 @default.
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- W2065756867 date "2014-02-18" @default.
- W2065756867 modified "2023-10-11" @default.
- W2065756867 title "Linear stability analysis of dynamical quadratic gravity" @default.
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- W2065756867 doi "https://doi.org/10.1103/physrevd.89.044023" @default.
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