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Pablo_Stafforini comments on Open thread, February 15-28, 2013 - Less Wrong Discussion
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Two papers from last week: "The universal path integral" and "Quantum correlations which imply causation".
The first defines a quantum sum-over-histories "over all computable structures... The universal path integral supports a quantum theory of the universe in which the world that we see around us arises out of the interference between all computable structures."
The second, despite its bland title, is actually experimenting with a new timeless formalism, a "pseudo-density matrix which treats space and time indiscriminately".
I don't believe in timeless physics, computation as fundamental, or quantum mechanics as fundamental, but many people here do, and it amused me to see two such papers coming out on the same day.