How Much Information is in a Quantum State?

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DATE : Wed, 27 May 2009 00:00:00 +0100
Entered in Database : 2009-05-26 23:00:00
length : 100476132
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People often talk about the quantum state of n entangled particles as if it contained an amount of information exponential in n. Sometimes, they draw the conclusion from this that quantum mechanics must be an extravagant theory valid only for simple systems or small numbers of particles, or that largescale quantum computing must be impossible in principle.

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