This includes quantum energy inequalities, flux energy conditions, and wormhole curvature, and sheds light on not just the theoretical physics but also on the possible applications to warp drives and time travel. Based on Einstein's field equations, this cutting-edge research area explores the more far-fetched theoretical outcomes of General Relativity and relates them to quantum field theory. Top researchers in the field of gravitation present the state-of-the-art topics outlined in this book, ranging from the stab ility of rotating wormholes solutions supported by ghost scalar fields, modified gravity applied to wormholes, the study of novel semi-classical and nonlinear energy conditions, to the applications of quantum effects and the superluminal version of the warp drive in modified spacetime. However, folk wisdom should be carefully and critically examined before being believed, and the present examples for general results will greatly aid physical intuition. Indeed, this confirms the community’s folk wisdom, and recent (fully general, but implicit) results of the present authors which closed previous gaps in the argument. Likewise the weak, strong, and dominant energy conditions (WEC, SEC, DEC) are violated. The resulting spacetimes are sufficiently simple to allow an exact and fully explicit computation of all of the stress-energy components, and verify that (as expected) the null energy condition (NEC) is violated. For simplicity, we consider generic Natário warp drives with zero-vorticity flow field. In this process, we will see that often-made throw-away comments regarding “payloads” are even simpler than commonly assumed, while there are two further, distinct yet subtle ways in which a mass can appear in connection with a warp drive space-time: One, that the warp bubble (not its payload) has the mass two, that the mass is a background feature in front of which the warp drive moves. What happens when a warp bubble has mass? This seemingly innocent question forces one to carefully formalize exactly what one means by a warp bubble, exactly what one means by having the warp bubble “move” with respect to the fixed stars, and forces one to more carefully examine the notion of mass in warp-drive spacetimes.
0 kommentar(er)
