Ferroelectrical Switching as a Probe of Quantum Damping in Magnetic Spin Systems

• URL: http://arxiv.org/abs/2606.07378v1
• Date: Fri, 05 Jun 2026 15:20:27 GMT
• Title: Ferroelectrical Switching as a Probe of Quantum Damping in Magnetic Spin Systems
• Abstract summary: We show that polarization reversal switches the inter-spin exchange between ferromagnetic and antiferromagnetic regimes.<n>We formulate a magnetization-based diagnostic that relates magnetization traces to entanglement dynamics.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: While damped spin dynamics is important for the understanding of magnetic materials, clear signatures of \emph{quantum corrections} to the Gilbert damping mechanism remain elusive. We propose a route to distinguish quantum and classical Gilbert spin damping using ferroelectric control of a magnetic dimer. Ab initio calculations for dimers on ferroelectric substrates show that polarization reversal switches the inter-spin exchange between ferromagnetic and antiferromagnetic regimes. We formulate a magnetization-based diagnostic that relates magnetization traces to entanglement dynamics, which enables ferroelectrical on/off control of dimer entanglement. Material-informed quantum Landau-Lifshitz-Gilbert simulations illustrate how the signature of magnetization dynamics can, in principle, be used to infer the existence of quantum Gilbert spin damping. This minimal and non-volatile platform connects first-principles modeling to experimentally accessible observables and provides a starting point for voltage-controlled quantum entanglement in magnetic spin networks.

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