4.8 • 4.4K Ratings
🗓️ 1 April 2024
⏱️ 82 minutes
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Einstein's theory of general relativity has been our best understanding of gravity for over a century, withstanding a variety of experimental challenges of ever-increasing precision. But we have to be open to the possibility that general relativity -- even at the classical level, aside from any questions of quantum gravity -- isn't the right theory of gravity. Such speculation is motivated by cosmology, where we have a good model of the universe but one with a number of loose ends. Claudia de Rham has been a leader in exploring how gravity could be modified in cosmologically interesting ways, and we discuss the current state of the art as well as future prospects.
Blog post with transcript: https://www.preposterousuniverse.com/podcast/2024/04/01/271-claudia-de-rham-on-modifying-general-relativity/
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Claudia de Rham received her Ph.D. in physics from the University of Cambridge. She is currently a professor of physics and deputy department head at Imperial College, London. She is a Simons Foundation Investigator, winner of the Blavatnik Award, and a member of the American Academy of Arts and Sciences. Her new book is The Beauty of Falling: A Life in Pursuit of Gravity.
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0:30.3 | Hello everyone and welcome to the Mindscape podcast. I'm your host Sean Carroll. |
0:34.0 | There's a talk that I sometimes give. I've been giving for the last year and a half. |
0:38.0 | I'm sure you can find versions of it online. |
0:40.0 | It's related to volume one, the biggest ideas in the universe where I go through classical mechanics, |
0:46.7 | space time, all the way up to general relativity, Einstein's theory of gravity. |
0:51.1 | So in the talk, I have the high aspiration of in one hour explaining to you Einstein's equation |
0:58.9 | in all of its specific real glory. |
1:01.6 | The real equation, R-mu-nu minus 1-halfN-New-N-Nu, not just E-C-Mee-square. That's easy enough. Everyone can understand that. |
1:10.0 | And one of the themes of this talk that I give is the equations are smarter than we are. |
1:17.5 | This is why I think it's worth the effort in a book like the biggest idea series of talking about the equations. |
1:25.0 | Not that it's the only way to talk about physics etc. |
1:28.0 | Just because I have some equations in my recent book doesn't mean that I'm suddenly |
1:32.0 | looking down upon people who don't have equations in their books. |
1:35.0 | I think that all different levels, all different approaches are interesting and important, but one of those interesting ones is the equation-based one. |
1:42.0 | And the reason why is because as I said |
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