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Environment-Assisted Precision Measurement

Goldstein, G. and Cappellaro, P. and Maze, J. R. and Hodges, J. S. and Jiang, L. and Sørensen, A. S. and Lukin, M. D. (2011) Environment-Assisted Precision Measurement. Physical Review Letters, 106 (14). Art. No. 140502. ISSN 0031-9007.

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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.

Item Type:Article
Related URLs:
URLURL TypeDescription
Jiang, L.0000-0002-0000-9342
Lukin, M. D.0000-0002-8658-1007
Additional Information:© 2011 American Physical Society. Received 10 January 2010; published 8 April 2011. This work was supported by the NSF, ITAMP, NIST, the Packard Foundation and the Danish National Research Foundation.
Funding AgencyGrant Number
Institute for Theoretical, Atomic, Molecular and Optical Physics (ITAMP)UNSPECIFIED
National Institute of Standards and Technology (NIST)UNSPECIFIED
David and Lucile Packard FoundationUNSPECIFIED
Danish National Research FoundationUNSPECIFIED
Issue or Number:14
Classification Code:PACS: 03.67.Ac, 03.65.Ta, 06.20.-f
Record Number:CaltechAUTHORS:20110502-111820322
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:23519
Deposited By: Tony Diaz
Deposited On:03 May 2011 17:16
Last Modified:04 Nov 2019 23:05

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