Good news in Warp Drive! (well...)

[rhoenix]

The dream of faster-than-light travel has been on the mind of humanity for generations. Until recently, though, it was restricted to the realm of pure science fiction. Theoretical mechanisms for warp drives have been posited by science, some of which actually jive quite nicely with what we know of physics. Of course, that doesn’t mean they’re actually going to work, though.

NASA researchers recently revisited the Alcubierre warp drive and concluded that its power requirements were not as impossible as once thought. However, a new analysis from the University of Sydney claims that using a warp drive of this design comes with a drawback. Specifically, it could cause cataclysmic explosions at your destination.

To see how the Alcubierre drive could devastate an entire star system, you have to know a little about how it would work. The ship would consist of a central pod, and a large flattened ring around it (pictured below). The ring would have to be made of an as-yet unidentified kind of dense exotic matter capable of bending space-time.

Supply the craft with enough energy, and the very fabric of the universe can be warped. NASA now believes this would require orders of magnitude less energy than Alcubierre originally thought. When activated, space behind an Alcubierre drive expands while contracting in front. The ship itself hums along in a stable pocket, or bubble in space. It turns out the bubble is the problem.

As your faster-than-light ship sails through the cosmos, it’s not alone. Although we often think of space as empty, there are loads of high-energy particles shooting through the void. The University of Sydney research [PDF] indicates that these particles are liable to get swept up in the craft’s warp field and remain trapped in the stable bubble.

The longer the journey lasts, the more of these dangerous particles build up. This doesn’t affect the ability of the warp drive to keep bending the laws of the universe — it’s the stopping that’s going to ruin your day.

The instant the Alcubierre drive is disengaged, the space-time gradient that allows it to effectively move faster than light goes away. All the energetic particles trapped during the journey have to go somewhere, and the researchers believe they would be blasted outward in a cone directly in front of the ship. Anyone or anything waiting for you at the other end of your trip would be destroyed.

Because of a funny little quirk of relativity, there is no upper limit to the amount of energy a Alcubierre drive could pick up. A long trip could vaporize entire planets upon your arrival. The researchers are beginning a new round of number crunching to see how bad the problem is. It’s possible the deadly particle beam could be projected in all directions, making Alcubierre drives unworkable. That spiffy warp ship might make a better weapon than method of transportation.

The Alcubierre drive is, of course, still highly speculative. NASA scientists are working with small-scale models in an effort to produce localized distortions in space, but this new Aussie research could give NASA something to think about. Even with future advances in technology, this method of space flight might prove to be impossible. At least then we wouldn’t have to worry about annihilating everyplace we try to explore.

Actually, that could be hilarious. I say we should get on this right away.

[frigidmagi]

So we haven't figured out how to travel FTL yet, but we may have figured out how to build FTL WMDs?

Are we sure we're not the warrior race in some sci-fi prologue?

[rhoenix]

So we haven't figured out how to travel FTL yet, but we may have figured out how to build FTL WMDs?

Are we sure we're not the warrior race in some sci-fi prologue?

To be fair, we humans made a nuclear weapon before we made a nuclear reactor. Making something blow up properly is always easier than making it do safer work over time.

Not that I'm disagreeing with you here. ;)

[Dark Silver]

Earthlings: We come in peace. . . to blow you up!

[Batman]

Um-if it's in a cone in the direction you're going all you need to do is change course so you're heading for empty space at the last minute, and if it's omnidirectional, it's pretty much a nonproblem to begin with? Just don't drop to impulse close to a planet.

[Josh]

Yeah, Bats hit my notion with this. Mind you, if you happen to point in a direction that vaporizes their outbound traffic the locals might not be happy to see you.

Frankly in the event that this ever became a real workable FTL concept the ramifications are kind of terrifying though.

[Batman]

On further contemplation what actually is empty space might be a tad hard to determine without FTL sensors. 'Um yeah, sorry about that, we didn't mean to' isn't going to mean much if you just vapourized several thousand of their citizens.

[Hotfoot]

Look, guys, we're talking about pretty math here. When we build something that can do any of this, then we can decide on if it would destroy a star system or not.

[Josh]

But I want it now!

[Batman]

Heck half the board population is bound to want it even more if it does turn out to inevitably double as an WMD.

[B4UTRUST]

Heck half the board population is bound to want it even more if it does turn out to inevitably double as an WMD.

I think you underestimate the murderous, homicidal, violent and generally malicious tendencies of the userbase on this board... I'd bump that estimate to around 90-95%

[Batman]

That'd be the 'inevitably' qualifier. I figured even here, there's people who would like to be able to travel to strange new worlds and meet new civilizations without burning them to a cinder on arrival.
'Optionally' useable as an WMD? I think your numbers are low

[Josh]

I figured even here, there's people who would like to be able to travel to strange new worlds and meet new civilizations without burning them to a cinder on arrival.

That's me, but I do like keeping all my options open.

After all my childhood promised me space princesses in one-piece swimsuits and bubble helmets. I'd hate to oopsie a solar system full of babes.

[Batman]

Aim at one of the outer planets? Probably won't do the system's stability any good in the long run but there should be time to evacuate the babes. Just remember not to go directly for Earth on the return trip.