Quantum slipstream drive

Quantum slipstream drive operates by routing energy through a vessel's main deflector, which then focuses a quantum field, allowing the vessel to penetrate the quantum barrier. In order to maintain the slipstream, the phase variance of the quantum field has to be constantly adjusted, or the slipstream would collapse, violently throwing the ship back into normal space. Similar in theory to transwarp travel, it could increase a ship's warp factor substantially.

Quantum slipstream drive was first encountered by the USS Voyager in the Delta Quadrant in 2374. According to the Borg, it was invented by a race they designated "Species 116". (VOY: "Timeless")

The Federation continues to experiment with quantum slipstreams, but issues with phase variances and the quantum matrix intergrity persist to make travel by it safe by any means.