lucidfox comments on Decoherence - Less Wrong

19 Post author: Eliezer_Yudkowsky 22 April 2008 06:41AM

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Comment author: Nyarpy 04 October 2012 08:30:12PM 3 points [-]

I've on my second reading of the Quantum Physics Sequence, and this struck me the first time as well, so now I've got to ask.

"The system at left is highly entangled—it's got a joint distribution that looks something like, 'There's two particles, and either they're both over here, or they're both over there.'"

Isn't this wrong, given the diagram? Wouldn't a description of this diagram be, "There are two particles, one over here and one over there?" Why wouldn't the diagram fold along the diagonal like in the "No Individual Particles" post? Wouldn't a diagram with a blob in the top-right and a blob in the lower-left better match the description given?

Comment author: lucidfox 09 February 2013 09:02:03PM 2 points [-]

Indeed, if the two axes are the coordinates of the two particles, then one blob should be in the lower left and the other in the upper right. Seems Eliezer made a mistake with this diagram.