Nonlinear single-spin spectrum analyzer

Shlomi Kotler*, Nitzan Akerman, Yinnon Glickman, Roee Ozeri

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

57 Scopus citations


Qubits have been used as linear spectrum analyzers of their environments. Here we solve the problem of nonlinear spectral analysis, required for discrete noise induced by a strongly coupled environment. Our nonperturbative analytical model shows a nonlinear signal dependence on noise power, resulting in a spectral resolution beyond the Fourier limit as well as frequency mixing. We develop a noise characterization scheme adapted to this nonlinearity. We then apply it using a single trapped ion as a sensitive probe of strong, non-Gaussian, discrete magnetic field noise. Finally, we experimentally compared the performance of equidistant vs Uhrig modulation schemes for spectral analysis.

Original languageAmerican English
Article number110503
JournalPhysical Review Letters
Issue number11
StatePublished - 14 Mar 2013
Externally publishedYes


Dive into the research topics of 'Nonlinear single-spin spectrum analyzer'. Together they form a unique fingerprint.

Cite this