Berlin 2018 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 50: HL Poster IV
HL 50.28: Poster
Thursday, March 15, 2018, 19:00–21:00, Poster B
Precise frequency estimation using a quantum sensor — •Simon Schmitt1, Daniel Louzon1,2, Tuvia Gefen2, Liam McGuinness1, Alex Retzker2, and Fedor Jelezko1 — 1Institute of Quantum Optics, University of Ulm, Germany — 2Racah Institute of Physics, The Hebrew University of Jerusalem, Israel
Precise frequency measurements are important for a range of applications in science, medicine and technology. Using a quantum sensor to measure frequency has particular advantages of sensitivity and spatial resolution to measure at the single molecule level. For quantum sensors, the best possible parameter estimation is limited by the sensor decoherence time. While for static components of a given Hamiltonian the uncertainty scales linear with the sensor coherence time, it was recently theoretically shown that for frequency estimation an optimal quadratic scaling is possible. We use single nitrogen vacancy centres in diamond to experimentally verify this enhanced scaling and discuss possible applications in nanoscale metrology, where frequency measurements are important in spectroscopy, imaging and analysis.