I'm not very good at math, and I read quantum physics in lay-books, but I would like to say that whoever wrote the article did a good job leading to where it was going (even if maybe not clear to me), I ended up thinking "Square root of -1" and then a few paragraphs later, there it was...

This could have just been a lucky guess, but I feel like the way they presented it my intuition understood what was happening though I can't mentally see/grok it. I think making music and messing with waveforms in synths also helps to understand this intuitively more than the actual math.

I would like to credit "The Theory of Almost Everything" by Robert Oerter for explaining it in a way I could understand 15 years ago https://www.goodreads.com/book/show/183207.The_Theory_of_Alm...

Great book with the history and explanation of a lot of quantum stuff, without being huge like Brian Greene's books (which I also love).