Publication: Instability of some k -essence spacetimes
Дата
2020
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© 2020 World Scientific Publishing Company.We study the stability properties of static, spherically symmetric configurations in k-essence theories with the Lagrangians of the form F(X), X φ,αφ,α. The instability under spherically symmetric perturbations is proved for the two recently obtained exact solutions for F(X) = F0X1/3 and for F(X) = F0X1/2 - 2Λ, where F0 and Λare constants. The first solution describes a black hole in an asymptotically singular spacetime, the second one contains two horizons of infinite area connected by a wormhole. It is argued that spherically symmetric k-essence configurations with n < 1/2 are generically unstable because the perturbation equation is not of hyperbolic type.
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Rodrigues, D. C. Instability of some k -essence spacetimes / Rodrigues, D.C., Bronnikov, K.A., Fabris, J.C. // International Journal of Modern Physics D. - 2020. - 10.1142/S0218271820500169
URI
https://www.doi.org/10.1142/S0218271820500169
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https://openrepository.mephi.ru/handle/123456789/20141
https://www.scopus.com/record/display.uri?eid=2-s2.0-85077867641&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000519726200008
https://openrepository.mephi.ru/handle/123456789/20141