How to Solve the Measure Problem

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In practice, for specific examples of infinity minus infinity, maybe there is a perfectly unique well-defined procedure for turning that into a well-defined number. In the case of the cosmological multiverse, you just don't know. It might be hard to figure out how to regularize this particular limit of infinity divided by infinity. But I'm not that convinced by any of the current proposals that have been put forward.

Physics is in crisis, what else is new? That's what we hear in certain corners, anyway, usually pointed at "fundamental" physics of particles and fields. (Condensed matter and biophysics etc. are just fine.) In this solo podcast I ruminate on the unusual situation fundamental physics finds itself in, where we have a theoretical understanding that fits almost all the data, but which nobody believes to be the final answer. I talk about how we got here, and argue that it's not really a "crisis" in any real sense. But there are ways I think the academic community could handle the problem better, especially by making more space for respectable but minority approaches to deep puzzles.

Blog post with transcript: https://www.preposterousuniverse.com/podcast/2023/07/31/245-solo-the-crisis-in-physics/

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