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Advanced Quantum Technologies

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

Ziyad Imara, Abderrahim El Allati, K. El Anouz, Farhan Saif

Published Apr 1, 2026• 0 citations
Publisher

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.

DOI
10.1002/qute.70285

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Abstract A scheme is proposed for generating controllable quantum correlations in a cavity‐magnomechanical system comprising a microwave cavity and two yttrium iron garnet (YIG) spheres. A single‐mode squeezed vacuum field drives the cavity, while a red‐detuned field excites the magnon modes within the YIG spheres. Activating the magnetostrictive effect in the spheres introduces phonon modes through geometric deformation. By linearizing the system dynamics and introducing slowly moving operators to neglect high‐frequency oscillatory terms, the correlated noise from the single‐mode squeezed vacuum field can be effectively transferred between the two magnon modes and the phonon modes. Control of the cavity‐magnon coupling rate breaks the system's symmetry, enabling the generation of tunable quantum squeezing, entanglement, and one‐way quantum steering. This tunability facilitates the development of quantum information processing platforms, offering a promising framework for advancing quantum information technologies.
Abstract Microwave‐optics entanglement is a vital component for building hybrid quantum networks. Here, a new mechanism for preparing stationary entanglement between microwave and optical cavity fields in a cavity optomagnomechanical system is proposed. It consists of a magnon mode in a ferrimagnetic crystal that couples directly to a microwave cavity mode via the magnetic dipole interaction and indirectly to an optical cavity through the deformation displacement of the crystal. The mechanical displacement is induced by the magnetostrictive force and coupled to the optical cavity via radiation pressure. Both the opto‐ and magnomechanical couplings are dispersive. Magnon–phonon entanglement is created via magnomechanical parametric down‐conversion, which is further distributed to optical and microwave photons via simultaneous optomechanical beamsplitter interaction and electromagnonic state‐swap interaction, yielding stationary microwave‐optics entanglement. The microwave‐optics entanglement is robust against thermal noise, which will find broad potential applications in quantum networks and quantum information processing with hybrid quantum systems.
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We show how to prepare macroscopic entanglement between an atomic ensemble and a large number of magnons in a ferrimagnetic yttrium-iron-garnet crystal. Specifically, we adopt an optomagnomechanical configuration where the magnetostriction-induced magnomechanical displacement couples to an optical cavity via radiation pressure, and the latter further couples to an ensemble of two-level atoms that are placed inside the cavity. We show that, by properly driving the cavity and magnon modes, optomechanical entanglement is created which is further distributed to the atomic and magnonic systems, yielding stationary entanglement between atoms and magnons. The atom-magnon entanglement is a result of the combined effect of opto- and magnomechanical cooling and optomechanical parametric down-conversion interactions. A competition mechanism between two mechanical cooling channels is revealed. We further show that genuine tripartite entanglement of three massive subsystems, i.e., atoms, magnons, and phonons, can also be achieved in the same system. Our results indicate that the hybrid optomagnomechanical system may become a promising system for preparing macroscopic quantum states involving magnons, photons, phonons, and atoms.