Results 11 to 20 of about 41,273 (213)
Multi-parameter Quantum Metrology [PDF]
Advances in Physics: X, 2016 The simultaneous quantum estimation of multiple parameters can provide a better precision than estimating them individually. This is an effect that is impossible classically. We review the rich background of multi-parameter quantum metrology, some of the
Baumgratz, Tillmann +2 more
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Physical Review Letters, 2005 We point out a general framework that encompasses most cases in which quantum effects enable an increase in precision when estimating a parameter (quantum metrology).
A. S. Holevo +3 more
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Advances in quantum metrology [PDF]
Nature Photonics, 2011 In classical estimation theory, the central limit theorem implies that the statistical error in a measurement outcome can be reduced by an amount proportional to n^(-1/2) by repeating the measures n times and then averaging. Using quantum effects, such as entanglement, it is often possible to do better, decreasing the error by an amount proportional to
GIOVANNETTI, VITTORIO +2 more
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Nature Photonics, 2012 Quantum metrology utilizes entanglement for improving the sensitivity of measurements. Up to now the focus has been on the measurement of just one out of two non-commuting observables.
A Abramovici +35 more
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Variational-state quantum metrology
New Journal of Physics, 2020 Quantum technologies exploit entanglement to enhance various tasks beyond their classical limits including computation, communication and measurements.
Bálint Koczor +4 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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Exponentially Enhanced Quantum Metrology [PDF]
Physical Review Letters, 2006 We show that when a suitable entanglement generating unitary operator depending on a parameter is applied on N qubits in parallel, and an appropriate observable is measured, a precision of order 2 raised to the power (-N) in estimating the parameter may ...
Braunstein, Samuel L., Roy, S. M.
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Interpreting Quantum Discord in Quantum Metrology [PDF]
Journal of Physics: Conference Series, 2015 Multipartite quantum systems show properties which do not admit a classical explanation. In particular, even nonentangled states can enjoy a kind of quantum correlations called quantum discord. I discuss some recent results on the role of quantum discord
Girolami, Davide
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Physics OpenWe address the characterization of two-qubit gates, focusing on bounds to precision in the joint estimation of the three parameters that define their Cartan decomposition.
Gabriele Fazio +2 more
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Optical Quantum Metrology [PDF]
PRX Quantum, 2022 The purpose of quantum technologies is to explore how quantum effects can improve on existing solutions for the treatment of information. Quantum photonics sensing holds great promise for reaching a more efficient trade-off between invasivity and quality
Marco Barbieri
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