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More In This Article * Overview _Is Quantum Reality Analog after All?_ (http://www.scientificamerican.com/article.cfm?id=is-quantum-reality-analog-after-all) Conventional wisdom says that quantum mechanics is a theory of discreteness, describing a world of irreducible building blocks. It stands to reason that computersÿÿwhich process information in discrete chunksÿÿshould be able to simulate nature fully, at least in principle. But it turns out that certain asymmetries in particle physics cannot be discretized; they are irreducibly continuous. In that case, says David Tong, author of "_Is Quantum Reality Analog after All?_ (http://www.scientificamerican.com/article.cfm?id=is-quantum-reality-analog-after-all) " in the December 2012 issue of Scientific American, the world can never be fully simulated on a computer.
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