No stable wormholes in Einstein-dilaton-Gauss-Bonnet theory

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19240%2F18%3AA0000253" target="_blank" >RIV/47813059:19240/18:A0000253 - isvavai.cz</a>

Výsledek na webu

<a href="https://journals.aps.org/prd/abstract/10.1103/PhysRevD.98.044040" target="_blank" >https://journals.aps.org/prd/abstract/10.1103/PhysRevD.98.044040</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.98.044040" target="_blank" >10.1103/PhysRevD.98.044040</a>

Jazyk výsledku

angličtina

Název v původním jazyce

No stable wormholes in Einstein-dilaton-Gauss-Bonnet theory

Popis výsledku v původním jazyce

In [Aneesh, S.; Bose, Sukanta; Kar, Sayan : Gravitational waves from quasinormal modes of a class of Lorentzian wormholes. PHYSICAL REVIEW D 97(12):124004] it was shown that the four-dimensional Einstein-dilaton-Gauss-Bonnet theory allows for wormholes without introducing any exotic matter. The numerical solution for the wormhole was obtained there and it was claimed that this solution is gravitationally stable against radial perturbations, what, by now, would mean the only known theoretical possibility for the existence of an apparently stable, four-dimensional and asymptotically flat wormhole without exotic matter. Here, more detailed analysis of perturbations shows that the Kanti-Kleihaus-Kunz wormhole is unstable against small perturbations for any values of its parameters. The exponential growth appears in the time domain after a long period of damped oscillations, in the sameway as it takes place in the case of unstable higher-dimensional black holes in the Einstein-Gauss-Bonnet theory. The instability is driven by the purely imaginary mode, which is nonperturbative in the Gauss-Bonnet coupling alpha.

Název v anglickém jazyce

No stable wormholes in Einstein-dilaton-Gauss-Bonnet theory

Popis výsledku anglicky

In [Aneesh, S.; Bose, Sukanta; Kar, Sayan : Gravitational waves from quasinormal modes of a class of Lorentzian wormholes. PHYSICAL REVIEW D 97(12):124004] it was shown that the four-dimensional Einstein-dilaton-Gauss-Bonnet theory allows for wormholes without introducing any exotic matter. The numerical solution for the wormhole was obtained there and it was claimed that this solution is gravitationally stable against radial perturbations, what, by now, would mean the only known theoretical possibility for the existence of an apparently stable, four-dimensional and asymptotically flat wormhole without exotic matter. Here, more detailed analysis of perturbations shows that the Kanti-Kleihaus-Kunz wormhole is unstable against small perturbations for any values of its parameters. The exponential growth appears in the time domain after a long period of damped oscillations, in the sameway as it takes place in the case of unstable higher-dimensional black holes in the Einstein-Gauss-Bonnet theory. The instability is driven by the purely imaginary mode, which is nonperturbative in the Gauss-Bonnet coupling alpha.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review D

ISSN

2470-0010

e-ISSN

2470-0029

Svazek periodika

98

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

„044040-1“-„044040-7“

Kód UT WoS článku

000442671700006

EID výsledku v databázi Scopus

2-s2.0-85052613789