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Environment-assisted metrology with spin qubits

Cappellaro, P. and Goldstein, G. and Hodges, J. S. and Jiang, L. and Maze, J. R. and Sørensen, A. S. and Lukin, M. D. (2012) Environment-assisted metrology with spin qubits. Physical Review A, 85 (3). Art. No. 032336. ISSN 1050-2947. doi:10.1103/PhysRevA.85.032336.

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We investigate the sensitivity of a recently proposed method for precision measurement [Phys. Rev. Lett. 106 140502 (2011)], focusing on an implementation based on solid-state spin systems. The scheme amplifies a quantum sensor response to weak external fields by exploiting its coupling to spin impurities in the environment. We analyze the limits to the sensitivity due to decoherence and propose dynamical decoupling schemes to increase the spin coherence time. The sensitivity is also limited by the environment spin polarization; therefore, we discuss strategies to polarize the environment spins and present a method to extend the scheme to the case of zero polarization. The coherence time and polarization determine a figure of merit for the environment's ability to enhance the sensitivity compared to echo-based sensing schemes. This figure of merit can be used to engineer optimized samples for high-sensitivity nanoscale magnetic sensing, such as diamond nanocrystals with controlled impurity density.

Item Type:Article
Related URLs:
URLURL TypeDescription
Jiang, L.0000-0002-0000-9342
Lukin, M. D.0000-0002-8658-1007
Additional Information:© 2012 American Physical Society. Received 23 December 2011; published 30 March 2012. This work was supported by the NSF, NIST, US Army Research Office (MURI Grant No. W911NF-11-1-0400), DARPA (QuASAR program), the Packard Foundation, the Danish National Research Foundation, the Sherman Fairchild Foundation and the NBRPC (973 program) 2011CBA00300 (2011CBA00301).
Funding AgencyGrant Number
Army Research Office (ARO)W911NF-11-1-0400
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Danish National Research FoundationUNSPECIFIED
Sherman Fairchild FoundationUNSPECIFIED
NBRPC 973 program2011CBA00300
NBRPC 973 program2011CBA00301
Issue or Number:3
Classification Code:PACS: 03.67.Ac, 03.65.Ta, 06.20.-f,
Record Number:CaltechAUTHORS:20120501-113828361
Persistent URL:
Official Citation:Environment-assisted metrology with spin qubits P. Cappellaro, G. Goldstein, J. S. Hodges, L. Jiang, J. R. Maze, A. S. Sørensen, and M. D. Lukin Published 30 March 2012 (8 pages) 032336
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:31251
Deposited By: Ruth Sustaita
Deposited On:01 May 2012 20:07
Last Modified:09 Nov 2021 19:48

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