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)

272 | Leslie Valiant on Learning and Educability in Computers and People

272 | Leslie Valiant on Learning and Educability in Computers and People

Science is enabled by the fact that the natural world exhibits predictability and regularity, at least to some extent. Scientists collect data about what happens in the world, then try to suggest "law...

15 Apr 20241h 8min

AMA | April 2024

AMA | April 2024

Welcome to the April 2024 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...

8 Apr 20243h 14min

271 | Claudia de Rham on Modifying General Relativity

271 | Claudia de Rham on Modifying General Relativity

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...

1 Apr 20241h 21min

270 | Solo: The Coming Transition in How Humanity Lives

270 | Solo: The Coming Transition in How Humanity Lives

Technology is changing the world, in good and bad ways. Artificial intelligence, internet connectivity, biological engineering, and climate change are dramatically altering the parameters of human lif...

25 Mar 20242h 9min

269 | Sahar Heydari Fard on Complexity, Justice, and Social Dynamics

269 | Sahar Heydari Fard on Complexity, Justice, and Social Dynamics

When it comes to social change, two questions immediately present themselves: What kind of change do we want to see happen? And, how do we bring it about? These questions are distinct but related; the...

18 Mar 20241h 11min

AMA | March 2024

AMA | March 2024

Welcome to the March 2024 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...

11 Mar 20243h 55min

268 | Matt Strassler on Relativity, Fields, and the Language of Reality

268 | Matt Strassler on Relativity, Fields, and the Language of Reality

In the 1860s, James Clerk Maxwell argued that light was a wave of electric and magnetic fields. But it took over four decades for physicists to put together the theory of special relativity, which cor...

4 Mar 20241h 30min

267 | Benjamin Breen on Margaret Mead, Psychedelics, and Utopia

267 | Benjamin Breen on Margaret Mead, Psychedelics, and Utopia

The twentieth century was something, wasn't it? Margaret Mead, as well as her onetime-husband Gregory Bateson, managed to play roles in several of its key developments: social anthropology and its imp...

26 Feb 20241h 13min

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