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- W2339528026 abstract "Quantum Fisher information (QFI) is a key concept in quantum state estimation, and Berry curvature (BC) is another basic concept to describe geometric properties of quantum states. In this paper, we consider pure states undergoing unitary parametrization processes and show that the BC serves as a lower bound for the product of QFIs corresponding to two different parameters through the Heisenberg uncertainty relation. This relation between QFI and BC implies that the estimation precisions of two different parameters are mutually restrictive due to finite BC, and the notion of QFI squeezing is introduced. A scenario of general su(2) parametrization is considered in detail to verify the relation between the QFI and BC." @default.
- W2339528026 created "2016-06-24" @default.
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- W2339528026 date "2016-04-21" @default.
- W2339528026 modified "2023-10-07" @default.
- W2339528026 title "Berry curvature as a lower bound for multiparameter estimation" @default.
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- W2339528026 doi "https://doi.org/10.1103/physreva.93.042115" @default.
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