Variational quantum algorithm for estimating the quantum Fisher information [PDF]
Physical Review Research, 2022 The quantum Fisher information (QFI) quantifies the ultimate precision of estimating a parameter from a quantum state and can be regarded as a reliability measure of a quantum system as a quantum sensor.
Jacob L. Beckey +3 more
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Quantum Cramer–Rao Bound for a Massless Scalar Field in de Sitter Space
Universe, 2017 How precisely can we estimate cosmological parameters by performing a quantum measurement on a cosmological quantum state? In quantum estimation theory, the variance of an unbiased parameter estimator is bounded from below by the inverse of measurement ...
Marcello Rotondo, Yasusada Nambu
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Fisher Information as General Metrics of Quantum Synchronization
Entropy, 2023 Quantum synchronization has emerged as a crucial phenomenon in quantum nonlinear dynamics with potential applications in quantum information processing. Multiple measures for quantifying quantum synchronization exist.
Yuan Shen +3 more
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Thermal Fisher Information for a Rotating BTZ Black Hole [PDF]
EntropyRelativistic quantum metrology provides a framework within which we can quantify the quality of measurement and estimation procedures while accounting for both quantum and relativistic effects.
Everett A. Patterson, Robert B. Mann
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Amplified multipartite entanglement witnessed in a quantum critical metal [PDF]
Nature CommunicationsStrong correlations in matter promote a landscape of quantum phases and associated quantum critical points. For metallic systems, there is increasing recognition that the quantum criticality goes beyond the Landau framework and, thus, further means are ...
Yuan Fang +6 more
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Fisher Information in Noisy Intermediate-Scale Quantum Applications [PDF]
Quantum, 2021 The recent advent of noisy intermediate-scale quantum devices, especially near-term quantum computers, has sparked extensive research efforts concerned with their possible applications.
Johannes Jakob Meyer
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Remote State Design for Efficient Quantum Metrology with Separable and Non-Teleporting States
Quantum Reports, 2021 Measurements leading to the collapse of states and the non-local quantum correlations are the key to all applications of quantum mechanics as well as in the studies of quantum foundation.
Rahul Raj +2 more
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RLD Fisher information bound for multiparameter estimation of quantum channels
New Journal of Physics, 2021 One of the fundamental tasks in quantum metrology is to estimate multiple parameters embedded in a noisy process, i.e. a quantum channel. In this paper, we study fundamental limits to quantum channel estimation via the concept of amortization and the ...
Vishal Katariya, Mark M Wilde
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Quantum Wasserstein distance based on an optimization over separable states [PDF]
Quantum, 2023 We define the quantum Wasserstein distance such that the optimization of the coupling is carried out over bipartite separable states rather than bipartite quantum states in general, and examine its properties. Surprisingly, we find that the self-distance
Géza Tóth, József Pitrik
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Quantum Reservoir Parameter Estimation via Fisher Information
Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2022 In this study, we show that as a result of weak interaction of different information environments structured with a single probe qubit, these environments can perform binary classification of the information they contain.
Deniz Türkpençe, Ufuk Korkmaz
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