Sean Carroll
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seanmcarroll.bsky.social
Sean Carroll
@seanmcarroll.bsky.social
Physics, philosophy, complexity. @jhuartssciences.bsky.social & @sfiscience.bsky.social. Host, #MindscapePodcast. Married to @jenlucpiquant.bsky.social.
Latest books: The Biggest Ideas in the Universe.
https://preposterousuniverse.com/
I might be scarred because, at least in my memory, my undergrad QM course was *nothing but* matching wave functions at boundaries of potentials. I presume other material was covered, but I have no recollection. I hope my unpleasant associations with the material aren't too obvious to the students.
November 10, 2025 at 5:09 PM
You end up with a transcendental equation that can't be solved analytically, but just by drawing pictures and thinking you can say a lot. There are a finite number of bound states, and that number is bigger as you increase the width or depth of the potential.
November 10, 2025 at 5:07 PM
Back to #QM1 after time off for an exam. (Time off for me, I guess, not for the students.)

Today the juicy topic of solving the finite square well! We learned how to match ψ and dψ/dx at a discontinuity in the potential V(x), then set about doing so.
November 10, 2025 at 5:06 PM
I suspect it could be good or bad depending on the person!
November 10, 2025 at 5:03 PM
Oh we have! Jennifer's cassoulet is famous.
November 10, 2025 at 1:31 PM
Can't believe I've never heard that one before.
November 10, 2025 at 1:26 PM
Andrew, who is a contemporary of mine in the theoretical-cosmologist game, has a new book out, The Random Universe: How Models and Probability Help Us Make Sense of the Cosmos.

yalebooks.yale.edu/book/9780300...
The Random Universe
An award-winning astrophysicist looks at how the understanding of uncertainty and randomness has led to breakthroughs in our knowledge of the cosmos   All o...
yalebooks.yale.edu
November 10, 2025 at 12:16 PM
McCain is just not fully back yet from
the knee. He’ll get there.
November 10, 2025 at 3:12 AM
Stuck pretty close to Daniel Boulud’s recipe, available online. It was amazing. (You just have to sacrifice a couple of bottles of wine to the cause.)
November 10, 2025 at 2:50 AM
I would be jealous except @jenlucpiquant.bsky.social made coq au vin, so I have no complaints.
November 10, 2025 at 2:44 AM
2️⃣0️⃣ 🤝 0️⃣
November 10, 2025 at 1:44 AM
Props to the Detroit Pistons, though. They’ve become a dangerous team. Just relentless.
November 10, 2025 at 1:31 AM
Have you had Avgolemono? Greek lemon-chicken soup. Amazing (if you get it somewhere good, or make it yourself).
November 9, 2025 at 5:24 PM
Great minds
November 9, 2025 at 12:04 PM
Watford is who Ben Simmons was supposed to be.
November 9, 2025 at 3:14 AM