Warped space-time for phonons moving in a perfect nonrelativistic fluid
arXiv:gr-qc/0211029 · doi:10.1209/epl/i2003-00103-6
Abstract
We construct a kinematical analogue of superluminal travel in the ``warped'' space-times curved by gravitation, in the form of ``super-phononic'' travel in the effective space-times of perfect nonrelativistic fluids. These warp-field space-times are most easily generated by considering a solid object that is placed as an obstruction in an otherwise uniform flow. No violation of any condition on the positivity of energy is necessary, because the effective curved space-times for the phonons are ruled by the Euler and continuity equations, and not by the Einstein field equations.
arXiv comment7 pages, 1 figure. Version as published; references updated
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- Non-Riemannian geometry of vortex acoustics
- Quasiparticle universes in Bose-Einstein condensates
- Chronology Protection Implementation in Analogue Gravity
- Simulating superluminal propagation of Dirac particles using trapped ions
- A Closer Look at Natário's Zero-Expansion Warp Drive