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Author Topic:   Warp drive not science fiction after all?
DevilsAdvocate
Member (Idle past 3101 days)
Posts: 1548
Joined: 06-05-2008


Message 16 of 18 (673386)
09-18-2012 5:28 PM
Reply to: Message 13 by ringo
09-18-2012 12:10 PM


Wouldn't warping spacetime mess up your destination?
That is an interesting proposition. Does warping spacetime permanently affect spacetime the spacecraft is 'traveling' through?

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 Message 13 by ringo, posted 09-18-2012 12:10 PM ringo has not replied

  
DevilsAdvocate
Member (Idle past 3101 days)
Posts: 1548
Joined: 06-05-2008


Message 17 of 18 (673388)
09-18-2012 5:33 PM
Reply to: Message 14 by Son Goku
09-18-2012 12:32 PM


Re: Warp Drive.
Alcubierre originally wrote down the spacetime with a warp drive bubble inside. Unfortunately the matter the field equations say is necessary to form the bubble is physically unrealistic.
Why is the buble physically unrealistic? Just curious.
Also, the deeper problem is that quantum field theory forbids the kind of matter the drive requires from existing. Basically you need large negative energy densities, but quantum field theory doesn't allow energy densities that large.
Why is the universe predisposed to positive energy densities as opposed to negative? And what does this exactly mean? How can you have negative energy? I am not really understanding this process. Will do more reading.

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Shield
Member (Idle past 2862 days)
Posts: 482
Joined: 01-29-2008


Message 18 of 18 (673390)
09-18-2012 5:44 PM
Reply to: Message 3 by DevilsAdvocate
09-17-2012 7:46 PM


But how is warping spacetime violating mass—energy equivalence? I don't believe the energy content of the universe is changing at all. We are just relocating matter from one location in spacetime to another location, correct?
Dont ask me questions i cannot answer

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 Message 3 by DevilsAdvocate, posted 09-17-2012 7:46 PM DevilsAdvocate has not replied

  
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