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Quasinormal modes in pure de sitter spacetimes

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arxiv hep-th/0404047 v2 pith:XTC4P2JY submitted 2004-04-06 hep-th gr-qc

Quasinormal modes in pure de sitter spacetimes

classification hep-th gr-qc
keywords perturbationsquasinormalscalardimensionalfermionpuresittercases
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We have studied scalar perturbations as well as fermion perturbations in pure de Sitter space-times. For scalar perturbations we have showed that well-defined quasinormal modes can exist provided that the mass of scalar field $m>\frac{d-1}{2l}$. The quasinormal frequencies of fermion perturbations in three and four dimensional cases have also been presented. We found that different from other dimensional cases, in three dimensional pure de Sitter spacetime there is no quasinormal mode for the s-wave. This interesting difference caused by the spacial dimensions is true for both scalar and fermion perturbations.

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  1. Scalar perturbations and strong cosmic censorship in a regular ABGB-de Sitter black hole spacetime

    gr-qc 2026-07 conditional novelty 6.0

    In regular ABGB-de Sitter black holes, near-extremal scalar perturbations decay fast enough (β>1/2) to violate strong cosmic censorship, and adding scalar mass can push the regularity parameter past β=1.