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/
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
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.
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
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.
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.
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
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.
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.
I suspect it could be good or bad depending on the person!
November 10, 2025 at 5:03 PM
I suspect it could be good or bad depending on the person!
Oh we have! Jennifer's cassoulet is famous.
November 10, 2025 at 1:31 PM
Oh we have! Jennifer's cassoulet is famous.
Can't believe I've never heard that one before.
November 10, 2025 at 1:26 PM
Can't believe I've never heard that one before.
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...
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
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...
yalebooks.yale.edu/book/9780300...
McCain is just not fully back yet from
the knee. He’ll get there.
the knee. He’ll get there.
November 10, 2025 at 3:12 AM
McCain is just not fully back yet from
the knee. He’ll get there.
the knee. He’ll get there.
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
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.)
I would be jealous except @jenlucpiquant.bsky.social made coq au vin, so I have no complaints.
November 10, 2025 at 2:44 AM
I would be jealous except @jenlucpiquant.bsky.social made coq au vin, so I have no complaints.
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
Props to the Detroit Pistons, though. They’ve become a dangerous team. Just relentless.
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
Have you had Avgolemono? Greek lemon-chicken soup. Amazing (if you get it somewhere good, or make it yourself).
Watford is who Ben Simmons was supposed to be.
November 9, 2025 at 3:14 AM
Watford is who Ben Simmons was supposed to be.