Environment-assisted precision measurement

G. Goldstein; P. Cappellaro; J. R. Maze; J. S. Hodges; L. Jiang; Anders Søndberg Sørensen; M. D. Lukin

doi:10.1103/PhysRevLett.106.140502

Environment-assisted precision measurement

G. Goldstein, P. Cappellaro, J. R. Maze, J. S. Hodges, L. Jiang, Anders Søndberg Sørensen, M. D. Lukin

65 Citationer (Scopus)

Abstract

We describe a method to enhance the sensitivity of precision measurements that takes advantage of the environment of a quantum sensor to amplify the response of the sensor to weak external perturbations. An individual qubit is used to sense the dynamics of surrounding ancillary qubits, which are in turn affected by the external field to be measured. The resulting sensitivity enhancement is determined by the number of ancillas that are coupled strongly to the sensor qubit; it does not depend on the exact values of the coupling strengths and is resilient to many forms of decoherence. The method achieves nearly Heisenberg-limited precision measurement, using a novel class of entangled states. We discuss specific applications to improve clock sensitivity using trapped ions and magnetic sensing based on electronic spins in diamond

Originalsprog	Engelsk
Tidsskrift	Physical Review Letters
Vol/bind	106
Udgave nummer	14
Sider (fra-til)	140502
Antal sider	4
ISSN	0031-9007
DOI	https://doi.org/10.1103/PhysRevLett.106.140502
Status	Udgivet - 8 apr. 2011

Adgang til dokumentet

10.1103/PhysRevLett.106.140502

Citationsformater

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AU - Goldstein, G.

AU - Cappellaro, P.

AU - Maze, J. R.

AU - Hodges, J. S.

AU - Jiang, L.

AU - Sørensen, Anders Søndberg

AU - Lukin, M. D.

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DO - 10.1103/PhysRevLett.106.140502

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