Retrieving "Exotic Energy Density" from the archives

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1. Propulsion Science

   Linked via "exotic energy density"

   Research inspired by the Alcubierre metrics focuses on contracting space ahead of a spacecraft and expanding it behind. While direct faster-than-light travel remains theoretical, the principles are being adapted for sub-light, highly efficient maneuvering drives.
   The required exotic energy density ($\rho_{exotic}$) to maintain a stable warp bubble is governed by the relationship:
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