• UnderpantsWeevil@lemmy.world
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    10 hours ago

    traveling back in time is not mathematically disallowed by the general relativity.

    Moving mass backwards through time isn’t strictly mathematically disallowed. Idk what it’s going to look like when it arrives, though.

    What does a Tachyon even look like?

    • hayk@lemmy.ml
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      6 hours ago

      i didn’t mean purely mathematically. but from the physics standpoint. in other words, if you provide enough dark energy and shape it into a specific configuration, it will generate space-time where time travel is possible in practice.

      • UnderpantsWeevil@lemmy.world
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        1 hour ago

        if you provide enough dark energy

        “How much ya got?”

        “Well, it’s a purely theoretical substance. But theoretically we’ve got more of that than all the regular energy in the known universe.”

        and shape it into a specific configuration

        I want to say that’ll be the easy part, but I guess it really depends how abstract of a shape we’re talking about and how malleable dark energy ends up being.