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Shawn Ryan

πŸ‘€ Speaker
60410 total appearances
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The Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

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.

The Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

So what happens is that,

The Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

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?

The Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

So I can, with gauge theories or with like these like,

The Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

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.

The Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

I can see the electric field is pulling me in, like you were saying, with this blanket and it being deformed.

The Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

So I can measure some features of this object in the center from the boundary.

The Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

And that's one of the ingredients to this holographic principle of like,

The Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

Can I just talk about the things in the boundary in isolation as its own theory?

The Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

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 Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

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 Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

the kinematics of the charges scattering.

The Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

So it's like Gauss's law, but applied to some scattering process.

The Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

It's their own interactions with each other.

The Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

And that's the funny thing.

The Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

It's these long range interactions that are busting in a curse.

The Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

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.

The Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

But we basically like,

The Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

There's something about the very low energy that is universal almost because of these kinds of classical equations of motion.

The Shawn Ryan Show
#312 Sabrina Pasterski - Theoretical Physicist on the Hidden Code of the Universe

So I guess long story short,