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QUANTUM CONTROL OF SPINS AND PHOTONS AT NANOSCALES

Department of Physics, Harvard University, Cambridge, MA 02138, USA

Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA

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Department of Physics, Harvard University, Cambridge, MA 02138, USA

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Department of Physics, Bates College, Lewiston, ME 04240, USA

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Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA

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Department of Physics, Harvard University, Cambridge, MA 02138, USA

Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA

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Department of Physics, Harvard University, Cambridge, MA 02138, USA

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Department of Physics, Harvard University, Cambridge, MA 02138, USA

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Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA

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Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA

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Department of Physics, Harvard University, Cambridge, MA 02138, USA

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Department of Physics, Harvard University, Cambridge, MA 02138, USA

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Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843, USA

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Department of Physics, Harvard University, Cambridge, MA 02138, USA

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R. L. WALSWORTH

Department of Physics, Harvard University, Cambridge, MA 02138, USA

Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA

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Department of Physics, Harvard University, Cambridge, MA 02138, USA

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https://doi.org/10.1142/9789814273008_0009Cited by:0 (Source: Crossref)

Abstract:

The detection of weak magnetic fields with high spatial resolution is an outstanding problem in diverse areas ranging from fundamental physics and material science to data storage and bio-imaging. Here we describe a new approach to magnetometry that takes advantage of recently developed techniques for coherent control of solid-state spin qubits. We experimentally demonstrate this novel magnetometer employing an individual electronic spin associated with a Nitrogen-Vacancy (NV) center in diamond. Using an ultra-pure diamond sample, we achieve shot-noise-limited detection of nanotesla magnetic fields at kHz frequencies after 100 seconds of averaging. In addition, we demonstrate sensitivity for a diamond nanocrystal with a volume of (30 nm)³. This magnetic sensor provides an unprecedented combination of high sensitivity and spatial resolution – potentially allowing for the detection of a single nuclear spin's precession within one second.

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Pushing the Frontiers of Atomic Physics

Pushing the Frontiers of Atomic Physics

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