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- W3159990405 abstract "The Heisenberg time-energy relation prevents determination of an atomic transition to better than the inverse of the measurement time. The relation generally applies to frequency estimation of a near-resonant field [1-3], since information on the field frequency can be used to infer the atomic transition [4, 5]. Here we demonstrate a frequency estimation technique that provides an uncertainty orders of magnitude below the Heisenberg limit with a single atom. With access to $N$ atoms, we propose a fundamental uncertainty limit improving as $sqrt{N}$, regardless of whether entanglement is employed. We describe implementation of the quantum fourier transform to estimate an unknown frequency without using entanglement. A comparison to classical algorithms severely limits the benefit that quantum algorithms provide for frequency estimation and that entanglement provides to quantum sensing in general." @default.
- W3159990405 created "2021-05-24" @default.
- W3159990405 creator A5002849509 @default.
- W3159990405 date "2021-05-18" @default.
- W3159990405 modified "2023-09-27" @default.
- W3159990405 title "Frequency measurements beyond the Heisenberg time-energy limit with a single atom" @default.
- W3159990405 cites W3140714041 @default.
- W3159990405 hasPublicationYear "2021" @default.
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