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arXiv · 2604.18681

Floquet engineering of spin-spin interactions in a hybrid atomic system

Daniel Gavilan-Martin·Grzegorz Łukasiewicz·Vincent Schäfer·Mikhail Padniuk·Adam Stefański·Adam Węglik·Emmanuel Klinger·Szymon Pustelny·Derek F. Jackson Kimball·Dmitry Budker·Arne Wickenbrock
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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.

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Daniel Gavilan-Martin, Grzegorz Łukasiewicz, Vincent Schäfer, Mikhail Padniuk, Adam Stefański, Adam Węglik, Emmanuel Klinger, Szymon Pustelny, Derek F. Jackson Kimball, Dmitry Budker, Arne Wickenbrock. 2026-04-20. Floquet engineering of spin-spin interactions in a hybrid atomic system. https://arxiv.org/abs/2604.18681

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