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This research demonstrates how modulating magnetic fields can extend the duration of superradiant pulses in atomic ensembles, enabling high-precision optical frequency measurements with reduced uncertainty. By controlling excitation energy release through interference effects, this work advances fundamental quantum optics techniques that could eventually support more stable clocks or sensors for AI-driven scientific instrumentation.
Active Optical Frequency Measurements with Superradiance Prolonged by a Modulated Magnetic Field
arXiv:2607.17647v1 Announce Type: new Abstract: Superradiant emission from long-lived excited states of an atomic ensemble confined in an optical cavity constitutes a practical source of light with narrow linewidth. In the pulsed regime, however, superradiance implies rapid emission and a broadening of the spectrum. Recent experiments have demonstrated constructive and destructive interference of superradiant emission by different strontium atomic transitions. In this article, we show that by modulating the atomic transition frequencies with a magnetic field, it is possible to control the release of the atomic excitation energy as a prolonged pulse or a train of superradiant pulses. By simulations, we show that heterodyne detection of the prolonged superradiance shows extremely sharp spectral features, which leads to significantly reduced frequency uncertainty and fluctuation.
Abstract:Superradiant emission from long-lived excited states of an atomic ensemble confined in an optical cavity constitutes a practical source of light with narrow linewidth. In the pulsed regime, however, superradiance implies rapid emission and a broadening of the spectrum. Recent experiments have demonstrated constructive and destructive interference of superradiant emission by different strontium atomic transitions. In this article, we show that by modulating the atomic transition frequencies with a magnetic field, it is possible to control the release of the atomic excitation energy as a prolonged pulse or a train of superradiant pulses. By simulations, we show that heterodyne detection of the prolonged superradiance shows extremely sharp spectral features, which leads to significantly reduced frequency uncertainty and fluctuation.
Quantum Physics (quant-ph); Optics (physics.optics)
arXiv:2607.17647 [quant-ph]
(or arXiv:2607.17647v1 [quant-ph] for this version)
https://doi.org/10.48550/arXiv.2607.17647 Focus to learn more arXiv-issued DOI via DataCite (pending registration)
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