Phase sensitive quantum spectroscopy with high frequency resolution
arXiv:2105.08381 · doi:10.1103/PhysRevA.104.L020602
Abstract
Classical sensors for spectrum analysis are widely used but lack micro- or nanoscale spatial resolution. On the other hand, quantum sensors, capable of working with nanoscale precision, do not provide precise frequency resolution over a wide range of frequencies. Using a single spin in diamond, we present a measurement protocol for quantum probes which enables full signal reconstruction on a nanoscale spatial resolution up to potentially 100\,GHz. We achieve amplitude and phase sensitivity and a relative frequency uncertainty of for a signal within of integration. This technique opens the way to quantum spectrum analysis methods with potential applications in electron spin detection and nanocircuitry in quantum technologies.
arXiv commentmain text 7 pages, 3 figures; supplemental 8 pages, 6 figures
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