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Robust Estimation of the Quantum Fisher Information on a Quantum Processor
PRX QuantumWe present the experimental measurement, on a quantum processor, of a series of polynomial lower bounds that converge to the quantum Fisher information (QFI), a fundamental quantity for certifying multipartite entanglement that is useful for metrological
Vittorio Vitale +5 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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Variational quantum algorithm for estimating the quantum Fisher information
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 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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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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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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Quantifying quantum-amplified metrology via Fisher information
Physical Review Research, 2022 We present a unified framework, based on quantum metrology concepts, for defining and quantifying deterministic noiseless quantum amplification of parameter-dependent processes, which plays an important role in increasing the precision of quantum sensing.
G. S. Agarwal, L. Davidovich
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Steered quantum coherence and quantum Fisher information in spin-chain system
Results in Physics, 2023 In this paper, we investigate steered quantum coherence, i.e., the l1 norm of steered coherence and the relative entropy of steered coherence, and the quantum Fisher information in the Gibbs state of two-qubit XXZ systems.
Biao-Liang Ye +2 more
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