Quantum metrology
Quantum metrology
复制标题
量子计量学
DOI:
10.1103/physrevlett.96.010401
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发表时间:
2006-01-13
影响因子:
8.6
通讯作者:
Maccone, L
中科院分区:
文献类型:
--
作者:
Giovannetti, V;Lloyd, S;Maccone, L
We point out a general framework that encompasses most cases in which quantum effects enable an increase in precision when estimating a parameter (quantum metrology). The typical quantum precision enhancement is of the order of the square root of the number of times the system is sampled. We prove that this is optimal, and we point out the different strategies (classical and quantum) that permit one to attain this bound.