期刊
JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS
卷 3, 期 5, 页码 337-340出版社
IOP PUBLISHING LTD
DOI: 10.1088/1464-4266/3/5/309
关键词
quantum interferometry; quantum phase; quantum estimation theory
We address the problem of the optimal quantum estimation of the coupling parameter of a bilinear interaction, such as the transmittivity of a beamsplitter or the internal phase-shift of an interferometer. The optimal measurement scheme confirms Heisenberg scaling of precision versus the total energy as an unsurpassable bound, but with a largely reduced multiplicative constant.
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