DIA Study: Warp Drive, Dark Energy, and Manipulation of Extra Dimensions (2010)

Re:DIA Study: Warp Drive, Dark Energy, and Manipulation of E... by GW150914 on Monday July 09, 2018 @03:03PM (#17492600)

It’s a cool idea, and admittedly would be a sort of loophole, but it might just mean that such a drive would require an arbitrarily high amount to work. Maybe Stephen Hawking was right and as soon as you build a machine capable of time travel, turning it on blows it up, because of QM effects. It does seem a little neat if how we intend to use the machine is the deciding factor in how it works.

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Re:DIA Study: Warp Drive, Dark Energy, and Manipulation of E... by sls on Monday July 09, 2018 @04:07PM (#17493036)

Back in his collection All the Myriad Ways, Larry Niven wrote a brief essay called "The Theory and Practice of Time Travel" that explored ideas like these. One excerpt:

> GIVEN: That the universe of discourse permits both time travel and the changing of the past.

> THEN: A time machine will not be invented in that universe.

> For, if a time machine is invented in that universe, somebody will change the past of that universe. There is just too much future subsequent to the invention of a time machine: too many people with too many good motives for meddling with too many events occurring in too much of the past.

thus

> Niven's Law: If the universe of discourse permits the possibility of time travel and of changing the past, then no time machine will be invented in that universe.

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Re:DIA Study: Warp Drive, Dark Energy, and Manipulation of E... by AnimalMuppet on Monday July 09, 2018 @03:14PM (#17492668)

It also could blow up if it accidentally causes time travel...

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