Floquet maser
Min Jiang, Haowen Su, Ze Wu, Xinhua Peng, Dmitry Budker
Abstract
Xe gas under damping feedback and unexpectedly observe a multimode maser that oscillates at frequencies of transitions between Floquet states. Our findings extend maser techniques to Floquet systems and open avenues to probe Floquet phenomena unaffected by decoherence, enabling a previously unexplored class of maser sensors. As a first application, our maser offers the capability of measuring low-frequency (1 to 100 mHz) magnetic fields with subpicotesla-level sensitivity, which is substantially better than state-of-the-art magnetometers and can be applied to, for example, ultralight dark matter searches.
Topics & Concepts
Floquet theoryMaserPhysicsMagnetometerQuantum decoherenceMagnetic fieldQuantum mechanicsOpticsQuantumNonlinear systemAtomic and Subatomic Physics ResearchCold Atom Physics and Bose-Einstein CondensatesQuantum, superfluid, helium dynamics