Using Entanglement Improves the Precision of Quantum Measurements
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- 12 December 2001
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 87 (27) , 270404
- https://doi.org/10.1103/physrevlett.87.270404
Abstract
We show how entanglement can be used to improve the estimation of an unknown transformation. Using entanglement is always of benefit in improving either the precision or the stability of the measurement. Examples relevant for applications are illustrated, for either qubits or continuous variables.Keywords
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