Results 61 to 70 of about 1,418,125 (307)
Realization of Versatile and Effective Quantum Metrology Using a Single Bosonic Mode [PDF]
PRX QuantumQuantum metrology offers the potential to surpass its classical counterpart, pushing the boundaries of measurement precision toward the ultimate Heisenberg limit.
X. Pan +8 more
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Improving metrology with quantum scrambling
Science, 2023 Quantum scrambling describes the spreading of information into many degrees of freedom in quantum systems, such that the information is no longer accessible locally but becomes distributed throughout the system. This idea can explain how quantum systems become classical and acquire a finite temperature, or how in black holes the information about the ...
Zeyang Li +9 more
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Finding the optimal probe state for multiparameter quantum metrology using conic programming [PDF]
npj Quantum InformationThe ultimate precision in quantum sensing could be achieved using optimal quantum probe states. However, current quantum sensing protocols do not use probe states optimally. Indeed, the calculation of optimal probe states remains an outstanding challenge.
Masahito Hayashi, Yingkai Ouyang
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Optimal Protocols for Quantum Metrology with Noisy Measurements [PDF]
PRX Quantum, 2022 Measurement noise is a major source of noise in quantum metrology. Here, we explore preprocessing protocols that apply quantum controls to the quantum sensor state prior to the final noisy measurement (but after the unknown parameter has been imparted ...
Sisi Zhou, S. Michalakis, T. Gefen
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Quantum advantage in postselected metrology [PDF]
Nature Communications, 2020 AbstractIn every parameter-estimation experiment, the final measurement or the postprocessing incurs a cost. Postselection can improve the rate of Fisher information (the average information learned about an unknown parameter from a trial) to cost. We show that this improvement stems from the negativity of a particular quasiprobability distribution, a ...
Arvidsson-Shukur, David R. M. +5 more
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Fully‐Optimized Quantum Metrology: Framework, Tools, and Applications [PDF]
Advanced Quantum TechnologiesThis tutorial introduces a systematic approach for addressing the key question of quantum metrology: For a generic task of sensing an unknown parameter, what is the ultimate precision given a constrained set of admissible strategies. The approach outputs
Qiushi Liu +3 more
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Phase-Space Geometry and Optimal State Preparation in Quantum Metrology with Collective Spins [PDF]
PRX Quantum, 2022 We revisit well-known protocols in quantum metrology using collective spins and propose a unifying picture for optimal state preparation based on a semiclassical description in phase space.
Manuel H. Muñoz-Arias +2 more
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Time-reversal-based quantum metrology with many-body entangled states [PDF]
Nature Physics, 2021 Linear quantum measurements with independent particles are bounded by the standard quantum limit, which limits the precision achievable in estimating unknown phase parameters.
Simone Colombo +6 more
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Applied Sciences, 2021 In this work, biomolecules, such as membrane proteins, lipids, and DNA, were identified and their spatial distribution was mapped within a single Escherichia coli cell by Raman hyperspectral imaging.
Giulia Barzan +5 more
doaj +1 more source
Operational meanings of a generalized conditional expectation in quantum metrology [PDF]
Quantum, 2022 A unifying formalism of generalized conditional expectations (GCEs) for quantum mechanics has recently emerged, but its physical implications regarding the retrodiction of a quantum observable remain controversial.
M. Tsang
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