Watch this excellent 3Blue1Brown/MinutePhysics video (17:34) which closely relates to class. In particular, it revisits polarized photons and some of what we’ve done for class already, but then moves on to Bell States and Bell’s Theorem, which I wish we had time to do, but we are going to focus on quantum computation next. If anyone is curious, I have an old video doing the underlying math of this that I can put up on canvas.

If you’re curious, here’s an article about a Bell test at NIST here in Boulder and how they are using it to make random numbers.