' Warp drive' spacetimes are useful as 'gedanken-experiments' that force us to confront the foundations of general relativity, and among other things, to precisely formulate the notion of 'superluminal' communication. Global and optical properties of warp-drive spacetimes are also discussed.įundamental limitations on ' warp drive' spacetimes 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. It is commonly believed that Alcubierre's warp drive works by contracting space in front of the warp bubble and expanding the space behind it. Natario, Jose [Department of Mathematics, Instituto Superior Tecnico (Portugal) I present a possible solution for one of these problems, and I suggest ways to at least soften the othersĮnergy Technology Data Exchange (ETDEWEB) However, in its original form, the proposal suffers from several fatal flaws, such as unreasonably high energies, energy moving in a locally spacelike direction, and a violation of the energy conditions of classical Einstein gravity. International Nuclear Information System (INIS)Īlcubierre's warp drive geometry seemingly represents the ultimate dream for interstellar travel: there is no speed limit, the passengers are weightless whatever the acceleration, and there is no time dilation. Our analytical analysis shows that massive scalar perturbations lead to stable QNMs.Īlcubierre's warp drive: Problems and prospects With this purpose in mind, we perform a QNM analysis of massive scalar field perturbations in the background of the eternal- Alcubierre-warp-drive spacetime. On the other hand, since the discovery of gravitational waves, the quasinormal modes (QNMs) of black holes have also been extensively studied. We find the same expression for the Hawking temperatures associated with the tunneling of both massive vector and scalar particles, and show this expression to be proportional to the velocity of the warp drive. In the present study, we use a recent eternal- warp-drive solution found by Alcubierre to study the effect of Hawking radiation upon an observer located within the warp drive in the framework of the quantum tunneling method. In a seminal paper, Alcubierre showed that Einstein's theory of general relativity appears to allow a super-luminal motion. Jusufi, Kimet Sakallı, Ä°zzet Övgün, Ali Quantum tunneling and quasinormal modes in the spacetime of the Alcubierre warp drive
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