Traversable Wormholes supported by Holographic Dark Energy with a modified Equation of State

Abstract

Inspired by holographic dark energy models, we consider different energy density profiles as possible sources needed to have traversable wormholes solutions. Since such energy densities are all positive, we are forced to introduce an equation of state of the form $p_{r}% (r)=\omega_{r}\left( r\right) \rho(r)$. We will find that Zero Tidal Forces can be imposed at the price of having the function $\omega_{r}\left( r\right) $ divergent for $r\rightarrow\infty$. To overcome this inconvenient, we abandon the request of having Zero Tidal Forces, by introducing appropriate modifications on the function $\omega_{r}\left( r\right) $ in such a way to obtain a finite result everywhere. We will find that such modifications will leave the behavior of the Equation of State close to the throat invariant. Moreover, despite of the initial assumption, we will find that every dark energy profile will be moved into the phantom region. Among the different energy density proposals, only one profile will not require a modification of the original $\omega _{r}\left(r\right) $ to have Zero Tidal Forces. Such an energy density profile will be consistent with the appearance of a Global Monopole.