NASA scientist Harold G. "Sonny" White published a paper in 2011 (
Warp Field Mechanics 101) improved Alcubierre's designs, dramatically reducing the amount of exotic matter from a Jupiter sized amount to about the size of Voyager 1.
In April 2020, Jessica Gallanis and Eytan Halm Suchard published a patent application for a drive named the Alcubierre-White Warp Drive.
Things may be closer than we think, 2063 isn't that far away.
So, according to that, the thicker the Warp bubble is, the less energy you need to expend.
The robotic/automated space-craft would achieve a speed of 10c and reach Alpha Centaury in 0.43 years (or just over 5 months).
Quite useful to establish a large array of scanners in SOL itself so we can get a better look at what's happening in our own neighborhood (not to mention further out) and also send probes to other nearby solar systems for surveying (like Alpha Centaury and bit further away).
Heck, we could potentially use this for automated self-replicating manufacturer bots to get around our own solar system and construct a Dyson Swarm in a smaller amount of time by disassembling Mercury and also harvesting the local asteroid field... and quite possibly, automation would be able to make more exotic matter much faster in space than we could probably on Earth.
Now the question remains... what form would this exotic matter actually be in?
And if the energy requirements are indeed improved and merged with other breakthroughs... what kind of power source would it have to be given the improvements in efficiency?
Fusion?
Antimatter?
Something else?
EDIT: On another, this further makes me think that Impulse engines on Trek are nothing more than subspace field manipulation generators. In that fiction, the low level subspace field is used to reduce the mass of the ship and achieve large speeds - at least 75 000 km/s.
Couldn't we use similar principles for Warp drive combined with all energy efficiencies and create a SUBLIGT engine so we can use it with say conventional power sources (and possibly Fusion when its done) if the efficiencies from the Phys.org paper I posted bring it in line with conventional nuclear power generation?