Algorithmic quantum sensing beyond T1 limit of frequency resolution
- Daniel Louzon (Ulm)
- Thomas Unden (Ulm)
- Boris Naydenov (Ulm)
- Prof. Fedor Jelezko (Ulm University)
- Prof. Dorit Aharonov (Hebrew University)
- Prof. Alex Retzker (Hebrew University)
Quantum metrology enhanced by repetitive quantum error correction.
- Nitrogen Vacancy center based magnetometer has shown unprecedented sensitivity and spatial resolution owing to its long coherence time and atomic size.
- The NV center's electron spin is a sensitive probe to external magnetic field but the sensitivity is intrinsically limited by its phase memory time T2*.
- Here we experimentally demonstrate, the approach presented in  of combining sensing protocol with Quantum error correction, which promises to tackle noise of high frequency where dynamical decoupling fails.
- This is a promising addition to state of the art techniques for quantum sensing in noisy environments.
Harvard University, Cambridge, Massachusetts
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 Unden, T et al. Phys Rev Lett 116,(2016).
 Arrad, G et al. Phys Rev Lett 112,(2014).