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

• URL: http://arxiv.org/abs/2604.18681v1
• Date: Mon, 20 Apr 2026 18:00:01 GMT
• Title: Floquet engineering of spin-spin interactions in a hybrid atomic system
• Abstract summary: We show that periodic modulation of the direction of the electron spin polarization leads to a Floquet-induced renormalization of the spin-exchange coupling.<n>The results establish a general mechanism for controlling interaction strengths in hybrid atomic systems.
• Score: 0.04242939794388292
• License: http://creativecommons.org/licenses/by/4.0/
• 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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