Dynamical wormholes in Lovelock gravity
arXiv:2111.14828 · doi:10.1103/PhysRevD.104.104050
Abstract
In this study we present evolving wormhole configurations in third-order {Lovelock} gravity and investigate the possibility that these solutions satisfy the energy conditions. Using a generalized Friedmann-Robertson-Walker spacetime, we derive evolving wormhole geometries by considering a constraint on the Ricci scalar. In standard cosmological models, the Ricci scalar is independent of the radial coordinate and is only a function of time. We use this property to introduce dynamic wormhole solutions expanding in an inflationary cosmological background and explore the effects of higher-order {Lovelock} terms on the dynamics of such wormholes. Our analysis shows that for suitable third-order {Lovelock} coefficients, there are wormhole solutions that respect the weak energy condition {(WEC)}. In addition to this, we also present other wormhole solutions that satisfy the WEC throughout their respective evolution.
23 pages & 8 figures
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