Retrieving "Negative Energy Density" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Negative Intrinsic Mass (nim)

   Linked via "negative energy density"

   The Kausler Drive Hypothesis
   The Kausler Drive hypothesizes that by carefully arranging a shell of $\text{NIM}$ around a metric distortion field generator, the required negative energy density for faster-than-light spatial compression can be supplied without violating the weak energy condition locally. This is because the effective energy density $\rho_{\text{eff}}$ of the $\text{NIM}$ shell …

2. Traversable Wormhole

   Linked via "negative energy density"

   The principal physical hurdle to forming and maintaining a traversable wormhole is the requirement for matter violating the null energy condition (NEC). The NEC states that for any null vector $k^\mu$, $T_{\mu\nu} k^\mu k^\nu \ge 0$. In General Relativity, normal matter (such as baryonic matter or radiation) satisfies the NEC.
   To keep the throat of a wormhole open against the immense attractive force of gravity, the throat structure must be supported by matte…