18 | Clifford Johnson on What's So Great About Superstring Theory

18 | Clifford Johnson on What's So Great About Superstring Theory

String theory is a speculative and highly technical proposal for uniting the known forces of nature, including gravity, under a single quantum-mechanical framework. This doesn't seem like a recipe for creating a lightning rod of controversy, but somehow string theory has become just that. To get to the bottom of why anyone (indeed, a substantial majority of experts in the field) would think that replacing particles with little loops of string was a promising way forward for theoretical physics, I spoke with expert string theorist Clifford Johnson. We talk about the road string theory has taken from a tentative proposal dealing with the strong interactions, through a number of revolutions, to the point it's at today. Also, where all those extra dimensions might have gone. At the end we touch on Clifford's latest project, a graphic novel that he wrote and illustrated about how science is done. Clifford Johnson is a Professor of Physics at the University of Southern California. He received his Ph.D. in mathematics and physics from the University of Southampton. His research area is theoretical physics, focusing on string theory and quantum field theory. He was awarded the Maxwell Medal from the Institute of Physics. Johnson is the author of the technical monograph D-Branes, as well as the graphic novel The Dialogues. Home page Wikipedia page Publications A talk on The Dialogues Asymptotia blog Twitter

Episoder(415)

AMA | May 2023

AMA | May 2023

Welcome to the May 2023 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). We take questions asked by Patreon...

8 Mai 20233h 8min

235 | Andy Clark on the Extended and Predictive Mind

235 | Andy Clark on the Extended and Predictive Mind

What is the mind, and what does it try to do? An overly simplified materialist view might be that the mind emerges from physical processes in the brain. But you can be a materialist and still recogniz...

1 Mai 20231h 21min

234 | Tobias Warnecke on Cellular Structure and Evolution

234 | Tobias Warnecke on Cellular Structure and Evolution

Eukaryotic cells manage to pull off a number of remarkable feats. One is packing quite a long DNA molecule, with potentially billions of base pairs, into a tiny central nucleus. A key role is played b...

24 Apr 20231h 6min

233 | Hugo Mercier on Reasoning and Skepticism

233 | Hugo Mercier on Reasoning and Skepticism

Here at the Mindscape Podcast, we are firmly pro-reason. But what does that mean, fundamentally and in practice? How did humanity come into the idea of not just doing things, but doing things for reas...

17 Apr 20231h 12min

232 | Amy Finkelstein on Adverse Selection and Hidden Information

232 | Amy Finkelstein on Adverse Selection and Hidden Information

If you knew exactly when every person was going to die, or require medical care, you could make a killing buying and selling insurance. Nobody knows these things, of course -- the future is hard to pr...

10 Apr 20231h 13min

Ask Me Anything | April 2023

Ask Me Anything | April 2023

Welcome to the April 2023 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). We take questions asked by Patre...

3 Apr 20234h 4min

231 | Sarah Bakewell on the History of Humanism

231 | Sarah Bakewell on the History of Humanism

Human beings are small compared to the universe, but we're very important to ourselves. Humanism can be thought of as the idea that human beings are themselves the source of meaningfulness and matteri...

27 Mar 20231h 21min

230 | Raphaël Millière on How Artificial Intelligence Thinks

230 | Raphaël Millière on How Artificial Intelligence Thinks

Welcome to another episode of Sean Carroll's Mindscape. Today, we're joined by Raphaël Millière, a philosopher and cognitive scientist at Columbia University. We'll be exploring the fascinating topic ...

20 Mar 20231h 57min

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