In this work we analyse the potential for a warp drive spacetime to develop instabilities due presence of quantum matter. Particularly, look points infinite blueshift (which are analogous black hole inner horizon, known its semiclassical instability), and categorise them through behaviour geodesics in their vicinity. We find that warp-drive bubbles dimension 2+1 or higher fact likely be stable,...

spotted amber ladybird, hippodamia variegata (goeze, 1777) (coleoptera: coccinellidae) is an important predator of aphids and some other insect pests. since shape and size variation may affect biological characteristics of an insect, multivariate analysis of shape variations in four geographically isolated populations of h. variegata (isfahan, shahrekord, shiraz, yasuj) was performed based on e...

It is commonly believed that Alcubierre’s warp drive works by contracting space in front of the warp bubble and expanding space behind it. We show that this contraction/expansion is but a marginal consequence of the choice made by Alcubierre, and explicitly construct a similar spacetime where no contraction/expansion occurs. Introduction Alcubierre’s warp drive spacetime ([Alc94]) allows effect...