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arXiv:quant-ph/0103160 · Physical Review A

Enhanced estimation of a noisy quantum channel using entanglement

Dietmar G. Fischer, Holger Mack, M. A. Cirone, Matthias Freyberger

Published Jul 12, 2001• 38 citations
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Abstract

We discuss the estimation of channel parameters for a noisy quantum channel---the so-called Pauli channel---using finite resources. It turns out that prior entanglement considerably enhances the fidelity of the estimation when we compare it to an estimation scheme based on separable quantum states.
DOI
10.1103/physreva.64.022309

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