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  "title": "Simultaneous Detection, Demodulation, and Angle-of-Arrival Determination of Communication Signals Using a Direct-Conversion Rydberg Receiver",
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    "fn": "Matt Simons",
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    "Data in the figures for the paper \"Simultaneous Detection, Demodulation, and Angle-of-Arrival Determination of Communication Signals Using a Direct-Conversion Rydberg Receiver\".  This is mostly experimental data collected by digitizers and oscilloscopes from photodetectors.",
    "In this work, we apply a radio-frequency (RF) homodyne measurement technique to demonstrate a direct, baseband readout and simultaneous demodulation of the in-phase (I) and quadrature (Q) components of standard communication signals using a dual ladder Rydberg receiver. In addition to directly demodulating the signal, the polarization sensitivity of this receiver design allows for a determination the signal's angle of arrival (AoA). We demonstrate a monotonic AoA curve as a function of the signal's true AoA. Although, this curve varies sensitively upon the experimental setup's exact geometry. We also demonstrate that regardless of the signal's AoA, the system is capable of determining the signal's relative phase to within ~ pm 2 degrees. We then compare the system's performance with a more conventional RF-heterodyne-based Rydberg receiver."
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    "Rydberg atoms",
    "atomic physics",
    "receivers",
    "fields strength",
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  "theme": [
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    "Physics:Atomic, molecular, and quantum"
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