interpretation

Farnsworth: "There is it. The edge of the Universe!" Fry: "Far out. So there's an infinite number of parallel Universes?" Farnsworth: "No, just the two." Fry: "Oh, well, I'm sure that's enough." Bender: "I'm sick of parallel Bender lording his cowboy hat over me!" -Futurama Our existence here in this Universe is something that we know is rare, special, beautiful, and full of wonder. Image credit: Kelly Montgomery. Some things happen with amazing regularity and predictability: the occurrence of days-and-nights, the tides, the seasons, the motion of the heavenly bodies, and so much more. The…

Earlier this week, I talked about the technical requirements for taking a picture of an interference pattern from two independent lasers, and mentioned in passing that a 1967 experiment by Pfleegor and Mandel had already shown the interference effect. Their experiment was clever enough to deserve the ResearchBlogging Q&A treatment, though, so here we go: OK, so why is this really old experiment worth talking about? What did they do? They demonstrated interference between two completely independent lasers, showing that when they overlapped the beams, the overlap region contained a pattern…

Blame Bryan O'Sullivan for this-- after his comment about misreading "Bohmian Mechanics" as "Bohemian Mechanics," I couldn't get this silly idea out of my head. And this is the result. I like to think that this was Brian May's first draft (he does have a Ph.D. in astrophysics, after all), before Freddie Mercury got hold of it: Is this the real life? Is this just fantasy? Do objects have real states Or just probabilities? Open your eyes Look up to the skies and see Studying quantum (poor boy), I need no sympathy Because I'm easy come, easy go A little psi, little rho No interpretation ever…

I get asked my opinion of Bohmian mechanics a fair bit, despite the fact that I know very little about it. This came up again recently, so I got some suggested reading from Matt Leifer, on the grounds that I ought to learn something about it if I'm going to keep being asked about it. One of his links led to the Bohmian Mechanics collaboration, where they helpfully provide a page of pre-prints that you can download. Among these was a link to the Bohmian Mechanics entry in the Stanford Encyclopedia of Philosophy, which seemed like a good place to start as it would be a) free, and b) aimed at a…