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arXiv · 2404.06297

Complete stability for spherically symmetric backgrounds in beyond Horndeski theory

S. Mironov·V. Volkova
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Abstract

We consider a general static, spherically symmetric background in the quadratic beyond Horndeski theory and analyse the behaviour of linear perturbations in both parity odd and parity even sectors. We derive a full set of stability conditions for an arbitrary static, spherically symmetric solution which guarantees absence of ghosts, gradient instabilities, tachyons and superluminal modes in both sectors.

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S. Mironov, V. Volkova. 2024-04-09. Complete stability for spherically symmetric backgrounds in beyond Horndeski theory. https://arxiv.org/abs/2404.06297

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