Coulomb Interaction‐Controlled Quantum Correlation and Teleportation Via Electro–Opto–Magnomechanical System

Abstract

ABSTRACT Combining radiation pressure and magnetostriction interactions offers a powerful opportunity to engineer tunable cavity optomagnomechanics, enabling rich physical phenomena and promising quantum applications. We propose an electro–opto–magnomechanical system that combines radiation‐pressure, magnetostrictive and Coulomb interactions within a single device. The system comprises optical photons, magnons, and two spatially separated charged mechanical resonators coupled via a tunable Coulomb interaction. While, a coherent feedback loop enhances the generated quantum correlations. This hybrid configuration enables strong macroscopic quantum correlations among photons, magnons, and phonons, yielding robust magnon–phonon entanglement that persists up to 3.4 K for the first mechanical mode and 1.6 K for the second. The Coulomb interaction is used to control quantum steering, enabling one‐way and two‐way steering between magnon and phonon modes. Under experimentally feasible parameters, our results predict a teleportation fidelity of which exceeds the classical threshold, demonstrating suitability for continuous‐variable quantum communication. Our results establish a powerful framework toward magnon‐based quantum information processing and advanced quantum technologies.