Thanks, that's a good explanation. What do you think is silly about "ra-ra-many-worlds"? The Everett interpretation itself, or just the amount of time EY spends making fun of other interpretations?

Also, my memory may be failing me, but I thought the "mangled worlds" stuff was Nick Bostrom, and not in the QM sequence. Am I thinking of something else?

Most of the silliness is just the making fun of other teams / boosting your team stuff. But some of the silliness is in overconfidence (under-caution?) with a dash of ignorance. We still have a whole theory of everything to figure out still, after all. And until there's a derivation of the Born probabilities, many worlds isn't necessarily simpler than a model with physical collapse. Many worlds and discontinuous faster than light collapse aren't the only two options, despite the dichotomous presentation. And cetera.

The "mangled worlds" stuff is Robin Hanson's idea originally, echoed by Eliezer occasionally in the QM sequence (for example, in the most recent sequence rerun).

How accurate is the quantum physics sequence?

by Paul Crowley 1 min read17th Apr 201268 comments


Prompted by Mitchell Porter, I asked on Physics StackExchange about the accuracy of the physics in the Quantum Physics sequence:

What errors would one learn from Eliezer Yudkowsky's introduction to quantum physics?

Eliezer Yudkowsky wrote an introduction to quantum physics from a strictly realist standpoint. However, he has no qualifications in the subject and it is not his specialty. Does it paint an accurate picture overall? What mistaken ideas about QM might someone who read only this introduction come away with?

I've had some interesting answers so far, including one from a friend that seems to point up a definite error, though AFAICT not a very consequential one: in Configurations and Amplitude, a multiplication factor of i is used for the mirrors where -1 is correct.

Physics StackExchange: What errors would one learn from Eliezer Yudkowsky's introduction to quantum physics?