Instabilities of wormholes and regular black holes supported by a phantom scalar field

By K. Bronnikov, R. Konoplya, A. Zhidenko. 2012

175 citations recorded by the source corpus.

We test the stability of various wormholes and black holes supported by a scalar field with a negative kinetic term. The general axial perturbations and the monopole type of polar perturbations are considered in the linear approximation. Two classes of objects are considered: (i) wormholes with flat asymptotic behavior at one end and AdS on the other (M-AdS wormholes) and (ii) regular black holes with asymptotically de Sitter expansion far beyond the horizon (the so-called black universes). A difficulty in such stability studies is that the effective potential for perturbations forms an infinite wall at throats, if any. Its regularization is in general possible only by numerical methods, and such a method is suggested in a general form and used in the present paper. As a result, we have shown that all configurations under study are unstable under spherically symmetric perturbations, except for a special class of black universes where the event horizon coincides with the minimum of the area function. For this stable family, the frequencies of quasinormal modes of axial perturbations are calculated.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/9a199fe227ea87d415706e916dc14a37036e1f46

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. A. Zhidenko
2. R. Konoplya
3. Aron Jansen
4. V. Cardoso
5. Paolo Pani
6. Cosimo Bambi
7. R. Schiappa
8. José Natário

In Nuclear and High Energy Physics

1. A. Zhidenko
2. R. Konoplya
3. Aron Jansen
4. V. Cardoso
5. Paolo Pani
6. R. Schiappa
7. José Natário
8. G. Compère

Citations in the corpus

• Wormholes versus black holes: quasinormal ringing at early and late times (2016, background): “Even more problematic is the issue of their stability: usually, the known wormhole solutions are unstable against small perturbations of space-time (see for example [9, 10] and reference therein).”
• Magnetically charged black holes from non-linear electrodynamics and the Event Horizon Telescope (2019, unknown): “[78–112].”