期刊
PHYSICAL REVIEW LETTERS
卷 87, 期 27, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.87.270404
关键词
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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.
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