High Quantum Stability is a technology on the Galactic Warfare technology tree with a research cost of 45000 
. It unlocks one Scientific Victory Unlock (which reduces the cost of Pan-Galactic Society), requires research in Ultradense Extrusion or in Advanced Reactives, and allows no further research.
"Advanced knowledge of entropy and nonbaryonic systems has led to breakthroughs in the understanding of how any form of matter decays. The capability exists to prevent, for the foreseeable future, any alteration in the initial state of a given element of matter."
Wired Galaxy[]
- -30% Scientific Victory Research cost on Empire
"One of the final steps to attaining a virtualized life form is the need to be able to communicate and travel wherever one wishes -- immortality on a chip locked in a closet is not the goal. To achieve this, the transport and communication systems that link the galaxy must be built from materials that will, quite simply, last forever."