利用纠缠可提高量子测量的精度。

Using entanglement improves the precision of quantum measurements.

作者信息

D'Ariano G M, Lo Presti P, Paris M G

机构信息

Quantum Optics & Information Group, Istituto Nazionale di Fisica della Materia, Dipartimento di Fisica A. Volta, Università di Pavia, via Bassi 6, I-27100 Pavia, Italy.

出版信息

Phys Rev Lett. 2001 Dec 31;87(27 Pt 1):270404. doi: 10.1103/PhysRevLett.87.270404. Epub 2001 Dec 12.

DOI:10.1103/PhysRevLett.87.270404

PMID:11800863

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.

摘要

我们展示了如何利用纠缠来改进对未知变换的估计。使用纠缠总是有助于提高测量的精度或稳定性。文中给出了适用于量子比特或连续变量的相关应用示例。