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Quantum Information in a Distributed Apparatus

Subhash Kak

quant-pharXiv:quant-ph/9804047

Abstract

We investigate the information provided about a specified distributed apparatus of n units in the measurement of a quantum state. It is shown that, in contrast to such measurement of a classical state, which is bounded by log (n+1) bits, the information in a quantum measurement is bounded by 3.7 x n(1/2) bits. This means that the use of quantum apparatus offers an exponential advantage over classical apparatus.

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