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Is the entire universe just a simulation ?

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Harley Quinn
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« on: April 17, 2016, 04:18:36 pm »

Davoudi proposed a possible way to spot one of these shortcuts: by studying cosmic rays, the most energetic particles scientists have ever observed. Cosmic rays would appear subtly different if space-time were formed of tiny, discrete chunks — like those computer pixels — as opposed to continuous, intact swaths, she said.

For the universe to be simulated in this way, it would have to be computed — meaning it would essentially be mathematical. Tegmark's recent book, "Our Mathematical Universe: My Quest for the Ultimate Nature of Reality" (Deckle Edge, 2014), focuses on why the universe seems so closely tied to math.

"The more I learned about [reality] later on, as a physicist, the more struck I was that, when you get deep down into how nature works, down into looking at all of you as a bunch of quarks and electrons […] if you look at how these quarks move around, the rules are entirely mathematical, as far as we can say," Tegmark said. If he were a character in a video game or simulation, he'd begin to realize that the rules were rigid and mathematical in just that way, Tegmark said.

While Davoudi proposed searching for concrete evidence of computation in nature, Gates, a physicist who works on superstring theory (an effort to describe all the universe's particles and forces with equations involving tiny, vibrating super-symmetric strings), has found something suspiciously like computation in the theoretical equations that govern how the universe works.

He discovered what looked like error-correcting codes, which are used to check for and correct errors that have been introduced through the physical process of computing. Finding that type of code in a universe that is not computed is "extremely unlikely," Gates said.
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