Sean Carroll
speaker
26,727 appearances
49 recordings
4 series
first heard Apr 2024
last heard 6d ago
Sean Carroll’s voice in public audio — every appearance, attributed to the second.
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recordings per month · last 12 monthsRecordings per month over the last 12 months — 29 in all, peaking in Jun 2026 with 6.
Appearances
You just give me the space time you want, I calculate the left hand side of Einstein's equation based on that, right?
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And then I posit that there
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maybe, should be, could be, a right hand side that makes the equation solved, right?
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In other words, there is always some
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distribution of matter and energy in the universe that could give you any space-time curvature at all.
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Unless you start putting restrictions on what kinds of matter and energy are allowed.
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And that's what is generally done in general relativity textbooks or proofs of theorems like the Penrose Hawking singularity theorems.
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They need to assume
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Some properties that energy momentum are not allowed to have in order to prove anything at all about possible solutions to Einstein's equation.
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So Alcubier didn't do that.
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He just helped himself to whatever he wanted.
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Okay?
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And so all Alcubier did was say, here is the metric I want.
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I can tell you what the energy would have to look like.
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It's going to involve negative numbers and things like that.
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I have no idea how to get it.
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Right.
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But if it could be gotten, then we could make this warp drive.
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And it's a little bit even more sketchy than that what is actually going on, because it's a solution to Einstein's equation for, you know, the curvature of space-time.
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It's kind of an all at once solution.
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Showing 461–480 of 26,727 · page 24 of 1337
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