Shawn Ryan
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Appearances Over Time
Podcast Appearances
And the fun thing about, you know, gauge theories, so gravity and electromagnetism kind of fit into this framework of the, there's an extra symmetry when you try to write down a field, like a set of equations that are local.
So what happens is that,
like when you have a charged object, so say you take some cat and you're like, I don't know, like some riboelectric effect thing to get some charge on like the fur, you're like static electricity or these things where you see like this balance of charging, you probe it far away, right?
So I can, with gauge theories or with like these like,
The fun thing is I can be away from the charge and see it, so I don't need to come up and pick up, oh, look, I have an electron charge.
I can see the electric field is pulling me in, like you were saying, with this blanket and it being deformed.
So I can measure some features of this object in the center from the boundary.
And that's one of the ingredients to this holographic principle of like,
Can I just talk about the things in the boundary in isolation as its own theory?
But for the very specific scope here, it's like that Gauss law type of setup of, okay, if I am very far away and I measure the electric field everywhere in some sphere, I can determine the total charge inside.
The analog of that when I then have an accelerating scattering experiment is kind of like this imprint of this universal, like I know from this low energy part of the radiation something about
the kinematics of the charges scattering.
So it's like Gauss's law, but applied to some scattering process.
It's their own interactions with each other.
And that's the funny thing.
It's these long range interactions that are busting in a curse.
So like the fact that they're charged and then they're gonna like have some photons exchange between them or other particles is the thing.
But we basically like,
There's something about the very low energy that is universal almost because of these kinds of classical equations of motion.
So I guess long story short,