the strange thing is that physics, especially in the form of quantum probability, has lately been seeping down the intellectual hierarchy, contaminating the “lower” levels of math and CS. This is how I’ve always thought about quantum computing: as a case of physics not staying where it's supposed to in the intellectual hierarchy! If you like, I’m professionally interested in physics precisely to the extent that it seeps down into the “lower” levels, which are supposed to be the least arbitrary ones, and forces me to rethink what I thought I understood about those levels.
