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Proceedings Paper

Nanoscale magnetic sensing using spin qubits in diamond
Author(s): J. R. Maze; P. Cappellaro; L. Childress; M. V. G. Dutt; J. S. Hodges; S. Hong; L. Jiang; P. L. Stanwix; J. M. Taylor; E. Togan; A. S. Zibrov; P. Hemmer; A. Yacoby; R. L. Walsworth; M. D. Lukin
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Paper Abstract

The ability to sense nanotelsa magnetic fields with nanoscale spatial resolution is an outstanding technical challenge relevant to the physical and biological sciences. For example, detection of such weak localized fields will enable sensing of magnetic resonance signals from individual electron or nuclear spins in complex biological molecules and the readout of classical or quantum bits of information encoded in an electron or nuclear spin memory. Here we present a novel approach to nanoscale magnetic sensing based on coherent control of an individual electronic spin contained in the Nitrogen-Vacancy (NV) center in diamond. At room temperature, using an ultra-pure diamond sample, we achieve shot-noise-limited detection of 3 nanotesla magnetic fields oscillating at kHz frequencies after 100 seconds of signal averaging. Furthermore, we experimentally demonstrate nanoscale resolution using a diamond nanocrystal of 30 nm diameter for which we achieve a sensitivity of 0.5 microtesla / Hz1/2.

Paper Details

Date Published: 2 February 2009
PDF: 8 pages
Proc. SPIE 7225, Advanced Optical Concepts in Quantum Computing, Memory, and Communication II, 722509 (2 February 2009); doi: 10.1117/12.813802
Show Author Affiliations
J. R. Maze, Harvard Univ. (United States)
P. Cappellaro, Harvard Univ. (United States)
Harvard-Smithsonian Ctr. for Astrophysics (United States)
L. Childress, Bates College (United States)
M. V. G. Dutt, Univ. of Pittsburgh (United States)
J. S. Hodges, Harvard Univ. (United States)
Massachusetts Institute of Technology (United States)
S. Hong, Harvard Univ. (United States)
L. Jiang, Harvard Univ. (United States)
P. L. Stanwix, Harvard-Smithsonian Ctr. for Astrophysics (United States)
J. M. Taylor, Massachusetts Institute of Technology (United States)
E. Togan, Harvard Univ. (United States)
A. S. Zibrov, Harvard Univ. (United States)
P. Hemmer, Texas A&M Univ. (United States)
A. Yacoby, Harvard Univ. (United States)
R. L. Walsworth, Harvard Univ. (United States)
Harvard-Smithsonian Ctr. for Astrophysics (United States)
M. D. Lukin, Harvard Univ. (United States)


Published in SPIE Proceedings Vol. 7225:
Advanced Optical Concepts in Quantum Computing, Memory, and Communication II
Zameer U. Hasan; Alan E. Craig; Philip R. Hemmer, Editor(s)

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