Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 51: Poster: Quantum Optics and Photonics IV
Q 51.64: Poster
Mittwoch, 7. März 2018, 16:15–18:15, Redoutensaal
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, Ulm, Germany — 2Racah institute of Physics, the Hebrew University of Jerusalem, Jerusalem , Israel
Precision measurements play an important part in many of today’s aspects of research, and are becoming an especially important part of the emerging field of quantum sensing. Reaching higher precision is paramount to gain meaningful information from such measurements with the majority of quantum sensing focused on optimizing the amplitude sensitivity to external field.
In this work use nitrogen vacancy center in diamond, as a single atom quantum sensor, in concert with dynamical decoupling to optimize the frequency precision with which an oscillating field can be detected. We show that given an AC signal with some knowledge on its frequency we can maximize the information we can gather on that frequency given some interaction time with our quantum sensor.
We also show, that the scaling of the Fisher Information about this frequency in this case is T4 ( T being the interaction time), which is the best purposed by theory. We show that this method is the best available method in the case of decoherence free subspace, or the more realistic case of a signal with short time phase correlations.