Ultralow frequency magnetic comb using pulse modulated spin maser
Phys. Rev. A 114, 052802 – Published 2 November, 2026
DOI: https://doi.org/10.1103/f1sz-dtdx
Abstract
Frequency combs are widely used in fundamental physics and practical applications in various areas. Here, we report the realization of an ultralow frequency magnetic comb using a pulse modulated spin maser in a Rb-Xe hybrid gaseous spin system. The magnetic frequency comb has a spectral distribution depending mainly on the pulse duration, and the strength and phase shift of the feedback field. A simple theoretical model is given in terms of the spin echo chain and preliminarily agrees with the experimental results. The magnetic frequency comb works in an ultralow frequency range and reaches a frequency resolution down to tens of nanohertz.
