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
The other famous thought experiment that Michael's question combined with it is the EPR thought experiment.
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Einstein, Podolski, and Rosen, they say construct two particles that are entangled with each other.
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Let them go very, very far away and measure one, and instantly the state of the other one is collapsed to whatever it needs to be to be compatible with the entanglement.
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You can't send signals using entangled particles because the person who would detect the second particle doesn't know that the first one has been detected and observed to be in a certain state, and therefore, as far as their
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concerned the probability of getting whatever measurement outcome they might get is just whatever it was before.
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So no signal has been sent.
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So Michael says, let's combine both of these.
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Let's imagine an EPR-like experiment where you have two particles that are entangled and moving in opposite directions.
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One goes toward Alice, one goes toward Bob.
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But rather than just detecting them, Alice and Bob have a double slit experiment.
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Each of them do, right?
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And, you know, they would both go through and maybe make interference patterns.
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And the question was: if Alice, at her double slit experiment, starts detecting.
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Which slit it goes through, then does the wave function for Bob's collapse?
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And now you know which slit it's going to go through, and therefore the interference pattern uh disappears.
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And my mistake was: well, so what I said was the interference pattern will disappear.
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And I gave a perfectly sensible argument for why that's true, because it will.
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But the problem is it was never there.
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That's what
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What I got got wrong.
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Showing 321–340 of 26,727 · page 17 of 1337
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