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

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Episoder(427)

157 | Elizabeth Strychalski on Synthetic Cells and the Rules of Biology

157 | Elizabeth Strychalski on Synthetic Cells and the Rules of Biology

Natural selection has done a pretty good job at creating a wide variety of living species, but we humans can't help but wonder whether we could do better. Using existing genomes as a starting point, b...

26 Jul 20211h 17min

156 | Catherine D'Ignazio on Data, Objectivity, and Bias

156 | Catherine D'Ignazio on Data, Objectivity, and Bias

How can data be biased? Isn't it supposed to be an objective reflection of the real world? We all know that these are somewhat naive rhetorical questions, since data can easily inherit bias from the p...

19 Jul 20211h 28min

155 | Stephen Wolfram on Computation, Hypergraphs, and Fundamental Physics

155 | Stephen Wolfram on Computation, Hypergraphs, and Fundamental Physics

It's not easy, figuring out the fundamental laws of physics. It's even harder when your chosen methodology is to essentially start from scratch, positing a simple underlying system and a simple set of...

12 Jul 20212h 40min

AMA | July 2021

AMA | July 2021

Welcome to the July 2021 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). I take the large number of questi...

9 Jul 20213h 49min

154 | Reza Aslan on Religion, Metaphor, and Meaning

154 | Reza Aslan on Religion, Metaphor, and Meaning

Religion is an important part of the lives of billions of people around the world, but what religious belief actually amounts to can vary considerably from person to person. Some believe in an anthrop...

5 Jul 20211h 25min

153 | John Preskill on Quantum Computers and What They're Good For

153 | John Preskill on Quantum Computers and What They're Good For

Depending on who you listen to, quantum computers are either the biggest technological change coming down the road or just another overhyped bubble. Today we're talking with a good person to listen to...

28 Jun 20211h 32min

152 | Charis Kubrin on Criminology, Incarceration, and Hip-Hop

152 | Charis Kubrin on Criminology, Incarceration, and Hip-Hop

It's all well and good to talk abstractly about morality and justice, but at some point you have to sit down and figure out what to do about people who break the rules. In our modern legal system, mos...

21 Jun 20211h 19min

151 | Jordan Ellenberg on the Mathematics of Political Boundaries

151 | Jordan Ellenberg on the Mathematics of Political Boundaries

Any system in which politicians represent geographical districts with boundaries chosen by the politicians themselves is vulnerable to gerrymandering: carving up districts to increase the amount of se...

14 Jun 20211h 23min

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