Floquet engineering of spin-spin interactions in a hybrid atomic system
Abstract
We demonstrate dynamical control of the effective spin-spin interaction, dominated by Fermi-contact interaction, in a hybrid spin system via parametric modulation. We show that, in an alkali-noble-gas comagnetometer, periodic modulation of the direction of the electron spin polarization with respect to the nuclear polarization leads to a Floquet-induced renormalization of the spin-exchange coupling, governed by a zeroth-order Bessel function. This effect enables continuous tuning and suppression of the effective interaction strength without altering the intrinsic properties of the system. We develop a theoretical model that supports the experimental measurements. The results establish a general mechanism for controlling interaction strengths in hybrid atomic systems and provide new opportunities for precision measurements and quantum memories.
Keywords
Cite
@article{arxiv.2604.18681,
title = {Floquet engineering of spin-spin interactions in a hybrid atomic system},
author = {Daniel Gavilan-Martin and Grzegorz Łukasiewicz and Vincent Schäfer and Mikhail Padniuk and Adam Stefański and Adam Węglik and Emmanuel Klinger and Szymon Pustelny and Derek F. Jackson Kimball and Dmitry Budker and Arne Wickenbrock},
journal= {arXiv preprint arXiv:2604.18681},
year = {2026}
}