I was reading blog articles as I was wont to do and I stumbled over a blog entry on ScreenRant about the deadliest Marvel superheroes. Most of the article is very tongue and cheek and can be taken with a grain of salt. I felt no alarm until I read the #1 entry placing Hank […]

# Author Archives: foolish physicist

## Angular momentum by harmonic oscillator

I’ve been thinking about Sakurai problem 3.19 for the past few days. The problem reads: 19.) What is the physical significance of the operators K+ ≡ a+†a-† and K- ≡ a+a- in Schwinger’s Scheme for angular momentum? Give nonvanishing matrix elements of K± I’m not sure I completely understand this problem yet. The ‘a’ operators […]

## How Quantum Mysticism Slips Free of the Math

(Subtitle: How I’m still seething after reading about Quantum University and seeing a bunch of boobs calling themselves ‘quantum physicists.’) After finishing that previous post, I realized that I still have more to say about the topic. I’ve actually read quite a bit from quantum cranks before and the topic never fails to inflame me. […]

## Grade A crankery at Quantum University

It would be accurate to call me a skeptic. There’s no intention in me to use this blog to debunk the overwhelming quantity of crap floating around the internet, but sometimes, I just need to open my mouth. Such an inspiration hit me while reading Respectful Insolence. In that post, Orac is talking about a […]

## Spherical Harmonics and State Rotation

Working my way through Sakurai problem 3.18. I spent quite a bit of time thinking about how exactly to interpret the math that underlies this problem. Here’s the problem as written in my notebook: “18.) Consider an orbital angular momentum eigenstate |l=2, m=0>. Suppose this state is rotated by an angle beta about the y-axis. […]

## NMR and Spin flipping

That first post I wrote, it sounds like I’m going to try to teach the world. Probably that won’t work. As I’m still looking for a place to dump my thoughts on this, I decided to moderate my ambition. This is all just a record of where I am. One of my recent focuses has […]

## Mathematical beauty, numerical artistry

This blog is not about me. The less about me, probably the better. The inspiration for this blog is a simple appreciation for the symbolic prestidigitation that gave us our deepest insights into the nature of our world. If you look around the popular media, you will see countless references to various branches of modern […]