Enhanced estimation of a noisy quantum channel using entanglement
- 12 July 2001
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 64 (2) , 022309
- https://doi.org/10.1103/physreva.64.022309
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.Keywords
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