Quantum error correction for metrology.
We propose and analyze a new approach based on quantum error correction (QEC) to improve quantum metrology in the presence of noise. We identify the conditions under which QEC allows one to improve the signal-to-noise ratio in quantum-limited measurements, and we demonstrate that it enables, in certain situations, Heisenberg-limited sensitivity. We discuss specific applications to nanoscale sensing using nitrogen-vacancy centers in diamond in which QEC can significantly improve the measurement sensitivity and bandwidth under realistic experimental conditions.
Physics Department, Harvard University, Cambridge, Massachusetts 02138, USA and ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA.
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EM
Kessler
Physics Department, Harvard University, Cambridge, Massachusetts 02138, USA.
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I
Lovchinsky
Physics Department, Harvard University, Cambridge, Massachusetts 02138, USA and Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA.
A O
AO
Sushkov
Physics Department, Harvard University, Cambridge, Massachusetts 02138, USA.
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MD
Lukin