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- W2018015605 abstract "For the last 20 years, the question of what are the fundamental capabilities of quantum precision measurements has sparked a lively debate throughout the scientific community. Typically, the ultimate limits in quantum metrology are associated with the notion of the Heisenberg limit expressed in terms of the physical resources used in the measurement procedure. Over the years, a variety of different physical resources were introduced, leading to a confusion about the meaning of the Heisenberg limit. Here, we review the mainstream definitions of the relevant resources and introduce the universal resource count, that is, the expectation value of the generator (above its ground state) of translations in the parameter we wish to estimate, that applies to all measurement strategies. This leads to the ultimate formulation of the Heisenberg limit for quantum metrology. We prove that this limit holds for the generators of translations with an upper-bounded spectrum." @default.
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- W2018015605 date "2012-04-18" @default.
- W2018015605 modified "2023-10-18" @default.
- W2018015605 title "Ultimate limits to quantum metrology and the meaning of the Heisenberg limit" @default.
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- W2018015605 doi "https://doi.org/10.1103/physreva.85.042112" @default.
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