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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

I think the reason that we study something like quantum gravity is, again, because we have this bias or we think that whatever the laws of nature are, there's a fundamental set that then leads to all these different regimes that you're studying.

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

If you didn't have that bias, maybe you shouldn't be doing that job.

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

If you have that bias, then the thing that you should be doing is trying to, again, merge various

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

rules into a single set of rules and so I guess the big outstanding one is this like short distance physics and long distance physics because at some point then you like we know there's quantum mechanics and we know that the GR is important so like there's some sense in which the actual observations guide you to this still open kind of problem of how what theoretical frameworks can consistently limit to both I think I mean to the extent that like why should the rules of like

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

tennis versus hockey have to be united, right?

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

Like, I think that, like, it's kind of cool that we think that the laws of nature are, like, there's something fundamental about it.

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

There's something highly compressible, like, about that description.

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

And I think that's a fun hypothesis, even, rather than just a belief to try to test it.

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

And you can kind of automate what you do as researchers in the future.

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

But yeah.

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

That would be, sorry, I think what I'm saying is if, so like space-time, so for me, it's like, it depends on, so sometimes you use the word space to mean space-time, but it's three plus one dimensions is our world.

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

And then the boundary is one dimension lower typically, and the celestial sphere is two dimensions lower because the boundary for these flat space-times is null in a way where like,

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

Basically, no other direction can talk to each other.

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

So again, the point would be, can we find an equivalent description or almost like we've seen it work in the past?

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

How do we apply it to this regime?

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

And then how do we learn something by seeing how we can't import it?

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

So again, physicists are constantly using mathematical frameworks that they already have.

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

and trying to tweak, like apply them to something different and then realize something goes wrong and then try to like learn about that framework by seeing how to modify it to make it work.

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

And so like in some sense, answer is yes.

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

But at the same time, you know, you want to try to see if I built a framework like that, would it tell me anything different about the structure at scales I can't see?