Quantum spectroscopy of single spins assisted by a classical clock

Tuvia Gefen, Maxim Khodas, Liam P. McGuinness, Fedor Jelezko, Alex Retzker

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Quantum spectroscopy with single two-level systems has considerably improved our ability to detect weak signals. Recently it was realized that for classical signals, precision and resolution of quantum spectroscopy is limited mainly by coherence of the signal and the stability of the clock used to measure time. The coherence time of the quantum probe, which can be significantly shorter, is not a major limiting factor in resolution measurements. Here, we address a similar question for spectroscopy of quantum signals, for example, a quantum sensor is used to detect a single nuclear spin. We present and analyze a novel correlation spectroscopy technique with performance that is limited by the coherence time of the target spins and the stability of the clock.

Original languageAmerican English
Article number013844
JournalPhysical Review A
Issue number1
StatePublished - 27 Jul 2018

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© 2018 American Physical Society.


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