Genuine magnon–photon–magnon tripartite entanglement in a cavity electromagnonical system based on squeezed-reservoir engineering

Zheng, Qianjun; Zhong, Wenxue; Cheng, Guangling; Chen, Ai-Xi

doi:10.1007/s11128-023-03880-y

Cited by 7 publications

(4 citation statements)

References 46 publications

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“…And Zhong et al [31] recently presented that the macroscopic tripartite entanglement and steering of three YIG spheres can be achieved by a squeezed reservoir. Moreover, the multipartite quantum correlations among the magnons, photons, phonons, and atoms have been studied [32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Nonreciprocal macroscopic tripartite entanglement in atom-optomagnomechanical system

Zheng,

Zhong,

Cheng

et al. 2024

EPJ Quantum Technol.

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We investigate how to generate the nonreciprocal macroscopic tripartite entanglement among the atomic ensemble, ferrimagnetic magnon and mechanical oscillator in a hybrid atom-optomagnomechanical system, where an ensemble of two-level atoms and a yttrium iron garnet micro-bridge supporting the magnon and mechanical modes are placed in a spinning optical resonator driven by a laser field. The phonon being the quantum of the mechanical mode interacts with the magnon and the optical photon via magnetostriction and radiation pressure, respectively, and meanwhile the photon couples to the atomic ensemble. The results show that not only all bipartite entanglements but also the genuine tripartite entanglement among the atomic ensemble, magnon and phonon could be generated at the steady state. Moreover, the nonreciprocity of atom-magnon-phonon entanglement can be obtained with the aid of the optical Sagnac effect by spinning the resonator, in which the entanglement is present in a chosen driving direction but disappears in the other direction. The nonreciprocal macroscopic tripartite entanglement is robust against temperature and could be flexibly controlled by choosing the system parameters. Our work enriches the study of macroscopic multipartite quantum states, which may have potential applications in the development of quantum information storage and the construction of multi-node chiral quantum network.

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Section: Introductionmentioning

confidence: 99%

Nonreciprocal macroscopic tripartite entanglement in atom-optomagnomechanical system

Zheng,

Zhong,

Cheng

et al. 2024

EPJ Quantum Technol.

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“…Meanwhile, the magnon mode is coupled to the DOI: 10.1002/andp.202300095 phonon mode in the YIG sphere via the magnetostrictive force, [1] resembling the radiation pressure force in a cavity optomechanical system. [10,11] In such systems, a wealth of phenomena have been observed, including magnetically induced transparency, [4] magnon dark modes, [12] self-sustained oscillations, [13] the phase transition at the exceptional point, [14] the bistability, [15][16][17] the Kerr effect of magnons, [18] the entanglement between the cavity, magnon, and phonon modes, [19][20][21][22][23][24] the entanglement between two magnon modes, [25,26] ternary logic gate, [27] magnon-induced nonreciprocity, [28] slow light, [29] quantum amplification of spin currents, [30] magnon-induced dynamical backaction, [31] and dynamical backaction evasion. [32] The squeezed state of a harmonic oscillator has less variance in one quadrature than that of its vacuum state, which indicates the reduction of quantum noise in that quadrature.…”

Section: Introductionmentioning

confidence: 99%

“…[50][51][52] The cavity magnomechanical system with a macroscopic YIG sphere is a good candidate to prepare the macroscopic quantum states due to the magnon-cavity interaction and the magnon-phonon interaction. [19][20][21][22][23][24][25][26]53,54] It has been shown that the squeezed states of the magnon and phonon modes in a cavity magnomechanical system can be generated via the injection of a squeezed vacuum field into the microwave cavity [53] and using two-tone microwave fields. [54] In this paper, we theoretically show how it is possible to achieve the steady-state squeezed states of the magnon and phonon modes in a cavity magnomechanical system by placing a degenerate microwave PA inside the microwave cavity.…”

Section: Introductionmentioning

confidence: 99%

Squeezed States of Magnons and Phonons in a Cavity Magnomechanical System with a Microwave Parametric Amplifier

2023

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The cavity magnomechanical system has become a promising platform for preparing macroscopic quantum states. In this work, a scheme for generating the steady‐state quadrature squeezing of the magnon and phonon modes in a cavity magnomechanical system is presented. This scheme uses a degenerate microwave parametric amplifier (PA) inside the microwave cavity. It is found that the squeezing of the cavity mode produced by the PA can be transferred to the magnon mode due to the cavity‐magnon beamsplitter‐like interaction, and the squeezing of the magnon mode can be further transferred to the phonon mode due to the magnon‐phonon beamsplitter‐like interaction induced by driving the magnon mode with a red‐detuned microwave field. The effects of the parametric gain and phase of the PA, the magnon‐cavity coupling strength, the power of the magnon drive, and the temperature of the environment on the squeezing of the magnon and phonon modes have been evaluated. The results show that the squeezing of the magnon and phonon modes is robust against the temperature of the environment.

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“…For instance, we may cite the generation of stationary entanglement between two MW fields by using magnetostrictive interaction [27][28][29] and the entanglement of two phonon modes of two YIG by utilizing the nonlinearity of the magnetostriction [30]. Interestingly enough, other nonlinearities have been used in the CMM systems [31], such as the nonlinearity of a flux-driven Josephson parametric amplifier to generate squeezed states of magnon and phonon modes [32] and entanglement of two magnon modes [33][34][35][36][37]. Additionally, the nonlinearity of the Kerr effect was utilized to enhance the entanglement between two magnons [38] and squeeze the state of magnon mode to enhance the entanglement [39].…”

Section: Introductionmentioning

confidence: 99%

Enhanced the Bi-(Tri-)partite entanglement between three magnons in a cavity magnomechanics system

Hidki

Ren

Lakhfif

et al. 2023

J. Phys. B: At. Mol. Opt. Phys.

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We propose a scheme to generate steady-state bipartite and tripartite entanglement in the cavity magnomechanical system, which consists of a microwave (MW) cavity field, three magnons, and a phonon mode. The three magnons are coupled to the MW cavity via the magnetic dipole interaction, and one of them is also coupled to the phonon mode through the magnetostrictive force. By utilizing the nonlinearity of the magnetostrictive force and the cavity-magnon interaction, the three magnons become mutually entangled, and the steady-state of the system displays a genuine tripartite entanglement. We found that there are optimum parameters, including the detunings and the cavity-magnon coupling, which lead to maximum entanglement. Moreover, the entanglement is robust against thermal effects.

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Genuine magnon–photon–magnon tripartite entanglement in a cavity electromagnonical system based on squeezed-reservoir engineering

Cited by 7 publications

References 46 publications

Nonreciprocal macroscopic tripartite entanglement in atom-optomagnomechanical system

Nonreciprocal macroscopic tripartite entanglement in atom-optomagnomechanical system

Squeezed States of Magnons and Phonons in a Cavity Magnomechanical System with a Microwave Parametric Amplifier

Enhanced the Bi-(Tri-)partite entanglement between three magnons in a cavity magnomechanics system

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