Quantum noise limited and entanglement-assisted magnetometry

Wojciech Wasilewski; Kasper Jensen; Hanna Krauter; Jelmer Jan Renema; M.V. Balabas; Eugene Simon Polzik

doi:10.1103/PhysRevLett.104.133601

Quantum noise limited and entanglement-assisted magnetometry

Wojciech Wasilewski, Kasper Jensen, Hanna Krauter, Jelmer Jan Renema, M.V. Balabas, Eugene Simon Polzik

257 Citations (Scopus)

Abstract

We study experimentally the fundamental limits of sensitivity of an atomic radio-frequency magnetometer. First, we apply an optimal sequence of state preparation, evolution, and the backaction evading measurement to achieve a nearly projection noise limited sensitivity. We furthermore experimentally demonstrate that Einstein-Podolsky-Rosen entanglement of atoms generated by a measurement enhances the sensitivity to pulsed magnetic fields. We demonstrate this quantum limited sensing in a magnetometer utilizing a truly macroscopic ensemble of 1.5×1012atoms which allows us to achieve subfemtotesla/ √Hz sensitivity.

Original language	English
Journal	Physical Review Letters
Volume	104
Issue number	13
Pages (from-to)	133601
Number of pages	4
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.104.133601
Publication status	Published - 31 Mar 2010

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10.1103/PhysRevLett.104.133601

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abstract = "We study experimentally the fundamental limits of sensitivity of an atomic radio-frequency magnetometer. First, we apply an optimal sequence of state preparation, evolution, and the backaction evading measurement to achieve a nearly projection noise limited sensitivity. We furthermore experimentally demonstrate that Einstein-Podolsky-Rosen entanglement of atoms generated by a measurement enhances the sensitivity to pulsed magnetic fields. We demonstrate this quantum limited sensing in a magnetometer utilizing a truly macroscopic ensemble of 1.5×1012atoms which allows us to achieve subfemtotesla/ √Hz sensitivity.",

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AU - Wasilewski, Wojciech

AU - Jensen, Kasper

AU - Krauter, Hanna

AU - Renema, Jelmer Jan

AU - Balabas, M.V.

AU - Polzik, Eugene Simon

PY - 2010/3/31

Y1 - 2010/3/31

N2 - We study experimentally the fundamental limits of sensitivity of an atomic radio-frequency magnetometer. First, we apply an optimal sequence of state preparation, evolution, and the backaction evading measurement to achieve a nearly projection noise limited sensitivity. We furthermore experimentally demonstrate that Einstein-Podolsky-Rosen entanglement of atoms generated by a measurement enhances the sensitivity to pulsed magnetic fields. We demonstrate this quantum limited sensing in a magnetometer utilizing a truly macroscopic ensemble of 1.5×1012atoms which allows us to achieve subfemtotesla/ √Hz sensitivity.

AB - We study experimentally the fundamental limits of sensitivity of an atomic radio-frequency magnetometer. First, we apply an optimal sequence of state preparation, evolution, and the backaction evading measurement to achieve a nearly projection noise limited sensitivity. We furthermore experimentally demonstrate that Einstein-Podolsky-Rosen entanglement of atoms generated by a measurement enhances the sensitivity to pulsed magnetic fields. We demonstrate this quantum limited sensing in a magnetometer utilizing a truly macroscopic ensemble of 1.5×1012atoms which allows us to achieve subfemtotesla/ √Hz sensitivity.

U2 - 10.1103/PhysRevLett.104.133601

DO - 10.1103/PhysRevLett.104.133601

M3 - Journal article

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JO - Physical Review Letters

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Quantum noise limited and entanglement-assisted magnetometry

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