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- W3208959295 abstract "Quantum metrology pursues high-precision measurements of physical quantities by using quantum resources. However, the decoherence generally hinders its performance. Previous work found that the metrological error tends to diverge in the long-encoding-time regime due to the Born-Markovian approximate decoherence, which is called the no-go theorem of noisy quantum metrology. Here we propose a Gaussian quantum metrology scheme using bimodal quantized optical fields as the quantum probe. It achieves the precision of a sub-Heisenberg limit in the ideal case. However, the Markovian decoherence causes the metrological error contributed by the center-of-mass mode of the probe to be divergent. A mechanism to remove this ostensible no-go theorem is found in the non-Markovian dynamics. Our result gives an efficient way to realize high-precision quantum metrology in practical continuous-variable systems." @default.
- W3208959295 created "2021-11-08" @default.
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- W3208959295 date "2021-10-28" @default.
- W3208959295 modified "2023-10-14" @default.
- W3208959295 title "Gaussian quantum metrology in a dissipative environment" @default.
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- W3208959295 doi "https://doi.org/10.1103/physreva.104.042609" @default.
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