Is the Universe a Quantum Computer?
Posted by Chris Young on 01.20.06
Such a quantum computation would constitute a complete description of nature, and so would be indistinguishable from nature. Thus, at bottom, the universe can be thought of as a performing a quantum computation. Likewise, because the behavior of elementary particles can be mapped directly onto the behavior of qubits interacting via logic operations, a simulation of the universe on a quantum computer is indistinguishable from the universe itself.
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