Quantum-enhanced magnetometry by phase estimation algorithms with a single artificial atom

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Quantum-enhanced magnetometry by phase estimation algorithms with a single artificial atom. / Danilin, S.; Lebedev, A. V.; Vepsalainen, A.; Lesovik, G. B.; Blatter, G.; Paraoanu, G. S.

In: npj Quantum Information, Vol. 4, 29, 29.06.2018.

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@article{4155474b1f2a47bb8722872aa7342e8d,
title = "Quantum-enhanced magnetometry by phase estimation algorithms with a single artificial atom",
abstract = "Phase estimation algorithms are key protocols in quantum information processing. Besides applications in quantum computing, they can also be employed in metrology as they allow for fast extraction of information stored in the quantum state of a system. Here, we implement two suitably modified phase estimation procedures, the Kitaev and the semiclassical Fourier-transform algorithms, using an artificial atom realized with a superconducting transmon circuit. We demonstrate that both algorithms yield a flux sensitivity exceeding the classical shot-noise limit of the device, allowing one to approach the Heisenberg limit. Our experiment paves the way for the use of superconducting qubits as metrological devices which are potentially able to outperform the best existing flux sensors with a sensitivity enhanced by few orders of magnitude.",
keywords = "METROLOGY, NOISE, LIMIT",
author = "S. Danilin and Lebedev, {A. V.} and A. Vepsalainen and Lesovik, {G. B.} and G. Blatter and Paraoanu, {G. S.}",
year = "2018",
month = "6",
day = "29",
doi = "10.1038/s41534-018-0078-y",
language = "English",
volume = "4",
journal = "npj Quantum Information",
issn = "2056-6387",

}

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TY - JOUR

T1 - Quantum-enhanced magnetometry by phase estimation algorithms with a single artificial atom

AU - Danilin, S.

AU - Lebedev, A. V.

AU - Vepsalainen, A.

AU - Lesovik, G. B.

AU - Blatter, G.

AU - Paraoanu, G. S.

PY - 2018/6/29

Y1 - 2018/6/29

N2 - Phase estimation algorithms are key protocols in quantum information processing. Besides applications in quantum computing, they can also be employed in metrology as they allow for fast extraction of information stored in the quantum state of a system. Here, we implement two suitably modified phase estimation procedures, the Kitaev and the semiclassical Fourier-transform algorithms, using an artificial atom realized with a superconducting transmon circuit. We demonstrate that both algorithms yield a flux sensitivity exceeding the classical shot-noise limit of the device, allowing one to approach the Heisenberg limit. Our experiment paves the way for the use of superconducting qubits as metrological devices which are potentially able to outperform the best existing flux sensors with a sensitivity enhanced by few orders of magnitude.

AB - Phase estimation algorithms are key protocols in quantum information processing. Besides applications in quantum computing, they can also be employed in metrology as they allow for fast extraction of information stored in the quantum state of a system. Here, we implement two suitably modified phase estimation procedures, the Kitaev and the semiclassical Fourier-transform algorithms, using an artificial atom realized with a superconducting transmon circuit. We demonstrate that both algorithms yield a flux sensitivity exceeding the classical shot-noise limit of the device, allowing one to approach the Heisenberg limit. Our experiment paves the way for the use of superconducting qubits as metrological devices which are potentially able to outperform the best existing flux sensors with a sensitivity enhanced by few orders of magnitude.

KW - METROLOGY

KW - NOISE

KW - LIMIT

U2 - 10.1038/s41534-018-0078-y

DO - 10.1038/s41534-018-0078-y

M3 - Article

VL - 4

JO - npj Quantum Information

JF - npj Quantum Information

SN - 2056-6387

M1 - 29

ER -

ID: 27451042