Sean Carroll
speaker
26,951 appearances
50 recordings
4 series
first heard Apr 2024
last heard yesterday
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 — 30 in all, peaking in Jun 2026 with 6.
Appearances
And you didn't construct the curvature of spacetime out of the strings.
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You proved that in order for the strings to consistently propagate through spacetime, that spacetime has to be curved in a certain way, and that certain way is predicted to be Einstein's equation for general relativity.
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So the spacetime through which
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Strings travel.
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has to obey the rules of general relativity.
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But space-time is there as an ingredient, right?
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So it's not that so when you say truly empty space between the strings, you know what what does that mean?
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I don't know what that means.
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It's it's empty space, but there's still a curvature, there's still a metric, there's still some geometry.
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But also this language of strings moving through curved space-time is kind of old-fashioned, okay?
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It is what is called perturbative string theory.
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where you just take strings and you let them bump into each other and you create the equivalent of Feynman diagrams and you look at them that way.
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But it was never the whole story.
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They they always knew it would never be the whole story.
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You need something more profound.
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This is why people like Joe Polczynski could write papers with titles in the nineteen nineties, like What is String Theory?
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Even though string theory was invented in the 60s and early 70s, by the 90s they're still asking what is it?
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And still now they're asking, what is it?
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We have explicit examples where you have things like the ATS CFT correspondence, where there's a duality between two theories.
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One of those theories is string theory, string theory in 10-dimensional, anti-deciditor space, compact.
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Showing 981–1000 of 26,951 · page 50 of 1348
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