We theoretically study the non-linear behavior of a hybrid quantum magnomechanical system, where the system consisting of a superconducting qubit couples dispersively to a magnon–phonon mode. The magnetic excitations (magnons) can interact with the mechanical vibrations of the system via a magnomechanical interaction, which results in the formation of magnomechanically induced transparency in the output of the system. We investigate the system’s switching behavior in the dressed qubit anharmonicity of the system and shows the sharp bistable frequency switching of the magnon–excitons. The proposed model also shows a realistic scheme to measure the magnon-qubit dispersive shift in the absorption spectra of the probe field. The absorption spectrum induced by the dispersive coupling shows a series of asymmetric double Fano line shapes whose positions can be determined by the magnon-qubit driving field. Our results will provide a theoretical approach to understand the complex and dynamic non-linear interactions and may come up with great significance in the realization of quantum sensing applications of magnonic systems.
We theoretically study the non-linear behavior of a hybrid quantum magnomechanical system, where the system consisting of a superconducting qubit couples dispersively to a magnon–phonon mode. The magnetic excitations (magnons) can interact with the mechanical vibrations of the system via a magnomechanical interaction, which results in the formation of magnomechanically induced transparency in the output of the system. We investigate the system’s switching behavior in the dressed qubit anharmonicity of the system and shows the sharp bistable frequency switching of the magnon–excitons. The proposed model also shows a realistic scheme to measure the magnon-qubit dispersive shift in the absorption spectra of the probe field. The absorption spectrum induced by the dispersive coupling shows a series of asymmetric double Fano line shapes whose positions can be determined by the magnon-qubit driving field. Our results will provide a theoretical approach to understand the complex and dynamic non-linear interactions and may come up with great significance in the realization of quantum sensing applications of magnonic systems.
Phenomena involved in magnons have attracted extensive attention for several decades because of their challenging physical properties, powerful capabilities, and potential applications in signal processing in the microwave frequency range. In this work study we study the steady-state dynamic processes of a hybrid quantum system based on magnonics, where the magnon mode couples dispersively to a superconducting qubit. We find that the dispersive coupling between the qubit and magnons causes the system to be bistable and we discuss in detail an interesting phenomenon of dispersive-coupling-induced absorption of magnons. Furthermore, a feasible scheme to measure the qubit-magnon dispersive shift by employing the absorption curves of the probe field is proposed. The results presented here are of great significance to the investigation of the steady-state dynamic behaviors of quantum magnonics in a strong-dispersive regime and may provide a theoretical reference for the realization of quantum sensing of magnons.
Abstract Hybrid quantum systems based on magnons in magnetic materials have made significant progress in the past decade. They are built based on the couplings of magnons with microwave photons, optical photons, vibration phonons, and superconducting qubits. In particular, the interactions among magnons, microwave cavity photons, and vibration phonons form the system of cavity magnomechanics (CMM), which lies in the interdisciplinary field of cavity QED, magnonics, quantum optics, and quantum information. Here, we review the experimental and theoretical progress of this emerging field. We first introduce the underlying theories of the magnomechanical coupling, and then some representative classical phenomena that have been experimentally observed, including magnomechanically induced transparency, magnomechanical dynamical backaction, magnon-phonon cross-Kerr nonlinearity, etc. We also discuss a number of theoretical proposals, which show the potential of the CMM system for preparing different kinds of quantum states of magnons, phonons, and photons, and hybrid systems combining magnomechanics and optomechanics and relevant quantum protocols based on them. Finally, we summarize this review and provide an outlook for the future research directions in this field.
Abstract In this paper, we propose a theoretical scheme to investigate the magnomechanically induced transparency (MMIT) phenomenon, Fano resonances, and slow/fast light effects in a hybrid cavity magnomechanical system. The magnomechanical system consists of two cavities: the principal cavity contains two ferromagnetic yttrium iron garnet (YIG) spheres, and the auxiliary cavity contains an atomic assembly. These two cavities are connected via photon tunneling, with the principal cavity being driven by two electromagnetic fields. The photon-magnon and phonon-magnon couplings are responsible for the magnon-induced transparency (MIT) and MMIT observed in the probe output spectrum. Furthermore, we examine the impacts of tunneling coupling, atom-photon coupling, and the magnetic field on the absorption, dispersion, and transmission spectra. We provide an explanation of the mechanism behind the Fano resonance phenomenon. Additionally, we address the phenomenon of slow and fast light propagation. Moreover, we demonstrate that the group delay of the probe field can be enhanced by increasing the photon tunneling strength. We also show that the slow light profile is reduced by adjusting the atom-photon coupling strength. This model is experimentally feasible, and we anticipate that these findings have potential applications in quantum information processing and communication.
In this paper, we propose a theoretical scheme to investigate the magnomechanically induced transparency (MMIT) phenomenon, Fano resonances, and slow/fast light effects in a hybrid cavity magnomechanical system. The magnomechanical system consists of two cavities: the principal cavity contains two ferromagnetic yttrium iron garnet (YIG) spheres, and the auxiliary cavity contains an atomic assembly. These two cavities are connected via photon tunneling, with the principal cavity being driven by two electromagnetic fields. The photon-magnon and phonon-magnon couplings are responsible for the magnon-induced transparency (MIT) and MMIT observed in the probe output spectrum. Furthermore, we examine the impacts of tunneling coupling, atom-photon coupling, and the magnetic field on the absorption, dispersion, and transmission spectra. We provide an explanation of the mechanism behind the Fano resonance phenomenon. Additionally, we address the phenomenon of slow and light propagation. Moreover, we demonstrate that group delay of the probe field can be improved by increasing photon tunneling strength. We also show that the slow light profile is decreased by adjusting the atom-photon coupling strength. This model is experimentally feasible. We hope these findings have the potential to be applied to the processing of quantum information and communication.
We propose a scheme for realizing nonreciprocal transparency, Fano resonances, and slow/fast light in a hybrid cavity magnomechanical system containing two YIG spheres and a mechanical resonator. The nonreciprocal behavior originates from the magnon Kerr nonlinearity, which induces direction-dependent frequency shifts and modifies the interference pathways among cavity photons, magnons, and phonons. We show that the hybrid system supports multiple transparency windows arising from magnon- and magnomechanical-induced interference processes. The Kerr interaction strongly reshapes these transparency features, producing asymmetric Fano resonance line shapes and enabling controllable nonreciprocal transmission. Furthermore, the associated dispersion exhibits pronounced directional asymmetry, leading to giant differences in the group delay for opposite propagation directions and allowing reversible switching between slow- and fast-light regimes. We investigate the roles of hybrid coupling strengths and dissipation channels and identify parameter regimes where the nonreciprocal response is maximized. These findings establish Kerr-engineered magnomechanical systems as promising platforms for integrated nonreciprocal microwave photonics and quantum information technologies.
We theoretically explore the tunability of magnomechanically induced transparency (MMIT) phenomenon and fast-slow light effect in a hybrid cavity magnomechanical system in which a high-quality yttrium iron garnet (YIG) sphere and an atomic ensemble are placed inside a microwave cavity. In the probe output spectrum, we can observe magnon-induced transparency (MIT) and MMIT due to the photon-magnon and phonon-magnon couplings. We further investigate the effect of atomic ensemble on the absorption spectrum. The results show that better transparency can be obtained by choosing appropriate atomic ensemble parameters. We give an explicit explanation for the mechanism of the Fano resonance phenomenon. Moreover, we discuss phenomena of slow-light propagation. The maximum group delay increases significantly with the increasing atom–cavity coupling strength, and the conversion between slow light and fast light can also be achieved by adjusting the atom–cavity coupling strength. These results may have potential applications for quantum information processing and high precision measurements.