Buracos de minhoca e condições de energia

Abstract

In this work we have discussed the theory about wormholes. Firtly we will describe wormholes that have spherical and symmetric geometry and that are static and stationary. It is argued that for a wormhole to actually be a passage between two asymptotically at universes, it is necessary that we have a widening of the throat in the region of radius r0. And from the Einstein eld equations for that wormhole, it is observed that the material that generates the wormhole, satisfying the are out conditions of the throat, has the property of violating energy conditions and hence, is called exotic matter. However, this type of matter is not the only source to violate the energy conditions. For example, scalar elds with minimal coupling are able to show such violations. Futhermore, we will show another geometries that characterizes a wormhole, more speci cally, a rotating wormhole, which generates an in nity of possible metrics, each of which is characterized by the speci cation of metric functions, and such speci cations will depend on their purposes. These functions must obey certain properties that are imposed in order to generate physically acceptable solutions of Einstein eld equations.