Higher-dimensional thin-shell wormholes in Einstein–Yang–Mills–Gauss–Bonnet gravity

Abstract

We present thin-shell wormhole solutions in the Einstein–Yang–Mills–Gauss–Bonnet (EYMGB) theory in higher dimensions d ⩾ 5. Exact black hole solutions are employed for this purpose where the radius of the thin shell lies outside the event horizon. For some reasons the cases d = 5 and d > 5 are treated separately. The surface energy–momentum of the thin shell creates surface pressures to resist against collapse and rendering stable wormholes possible. We test the stability of the wormholes against spherical perturbations through a linear energy–pressure relation and plot stability regions. Apart from this restricted stability we investigate the possibility of normal (i.e. non-exotic) matter which satisfies the energy conditions. For negative values of the Gauss–Bonnet (GB) parameter we obtain such physical wormholes.