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arXiv 1004.3944quant-ph
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量子精密测量中海森堡极限的一般最优性

General optimality of the Heisenberg limit for quantum metrology

Marcin Zwierz, Carlos A. Perez-Delgado, Pieter Kok

摘要:

量子精密测量保证了在参数估计中优于经典过程的改进的灵敏度。然而,有一个广泛的争论的问题如何与资源(如平均光子数)和数量的查询,在估计过程中使用的灵敏度尺度。在这里,我们调和参数估计中使用的相关资源的物理定义与量子网络的查询复杂性方面的信息理论缩放。这导致了一个完全一般的最优性证明的海森堡极限的量子精密测量。我们给出了一个例子,我们的证明如何解决悖论,建议超出海森伯极限的敏感性,我们表明,海森伯极限是一个信息理论解释的马戈卢斯-列维京界,而不是海森伯的不确定性关系。

英文摘要:

Quantum metrology promises improved sensitivity in parameter estimation over classical procedures. However, there is an extensive debate over the question how the sensitivity scales with the resources (such as the average photon number) and number of queries that are used in estimation procedures. Here, we reconcile the physical definition of the relevant resources used in parameter estimation with the information-theoretical scaling in terms of the query complexity of a quantum network. This leads to a completely general optimality proof of the Heisenberg limit for quantum metrology. We give an example how our proof resolves paradoxes that suggest sensitivities beyond the Heisenberg limit, and we show that the Heisenberg limit is an information-theoretic interpretation of the Margolus-Levitin bound, rather than Heisenberg's uncertainty relation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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