I’ve posted a new article in the physics for mathematicians series. This one is on renormalization, and it forms the end of the main arc of the story I’ve been wanting to tell in the quantum field theory series. If you’ve been following those articles, I hope you find this one interesting, and I’d very much like to hear from you if you have any questions, suggestions, or corrections.

I’ve been engaged in this project in some form for around ten years, so it feels very nice to reach this milestone. There are still several quantum field theory stories that I’d like to learn and present here in the future, though. My current plan is for any future QFT articles to have more of a branching structure rather than building on each other in sequence like the existing ones have done. (Four articles in a row is already more than I originally wanted to end up with!) The first of these will probably be on the functional integral formulation of quantum field theory and its relationship to the Wilsonian perspective on renormalization.

The next article I’m working on for the site, though, is a followup to the generating functions piece from a couple months ago. As always, if you’re enjoying my content or you have any thoughts about what you’d like to see here, feel free to reach out by email. I’d love to hear from you.