handoflixue comments on Decoherence - Less Wrong

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

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Comment author: handoflixue 29 July 2011 12:35:17AM 0 points [-]

Trying to violate CPT symmetry doesn't sound quite as awful to a modern physicist as trying to throw a baseball so hard it travels faster than light. But it's almost that awful.

http://www.nytimes.com/2010/02/16/science/16quark.html?pagewanted=all seems to be an article about violating parity, which I'm guessing is what you're talking about here? If so, it's nice finally having a context for that article :)

Comment author: endoself 26 November 2011 12:53:40AM 1 point [-]

Parity is just one component of CPT symmetry. If you just interchange left and right, physics is almost the same, but not quite. That article is about measuring that asymmetry. If, however, all three components are interchanged, then, as far as we know, the laws of physics are exactly the same, which is what is used to prove the second law of thermodynamics.