Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:2412.11359 · Journal of Physics B Atomic Molecular and Optical Physics

Magnon blockade with skyrmion qubit-magnon coupling in a hybrid quantum system

Si-Tong Jin, Shi-Wen He, Zi‐Long Yang, Xuanxuan Xin, Chong Li

Published Aug 4, 2026• 0 citations
arXivHTMLPDF

Abstract

Abstract Magnon blockade (MB) is a fundamental quantum phenomenon for generating single-magnon states, and has gradually become one of the candidates for quantum information processing. We extend existing blockade optimization schemes to a hybrid system consisting of a YIG micromagnet and a skyrmion, and propose a theoretical scheme for achieving MB on this platform. Under weak magnon probing and external driving of the skyrmion qubit, the second-order correlation function is analytically derived, and the optimal parameter conditions for both conventional and unconventional MB are identified. By appropriately adjusting the intensities of the driving and probing fields, the MB effect is significantly enhanced, multi-magnon excitations are effectively suppressed, and strong antibunching is achieved. Further analysis reveals that MB originates from two distinct physical mechanisms: conventional blockade induced by anharmonicity of the energy level structure, and unconventional blockade arising from quantum interference between different transition paths. On this platform, the two mechanisms coexist and can be synergistically controlled, and their cooperation yields a blockade effect superior to that of either mechanism alone. This work thus provides a feasible theoretical scheme for the effective manipulation of MB effects.

DOI
10.1088/1361-6455/ae94c5

Related papers

Magnon Blockade in a Hybrid Magnon‐Superconducting Qubit System

Xinxin Zheng, Mei‐Rong Wei, Qi Guo

ABSTRACT We propose a scheme to realize magnon blockade in a hybrid system composed of a transmon‐type superconducting qubit directly coupled to the magnon mode of a single‐crystalline yttrium‐iron‐garnet sphere. By applying two‐tone driving to the qubit, we engineer an effective Hamiltonian for the magnon mode including both single‐magnon and two‐magnon interaction. Due to the destructive interference between two transition paths, the two‐magnon excitation is suppressed, and thus the unconventional magnon blockade can be achieved. We also demonstrate that the intrinsic anharmonicity of the qubit can be transferred to the magnon mode through their coherent hybridization, but this anharmonicity has almost no influence on the blockade effect. Through solving the second‐order correlation function analytically and numerically, we show that the scheme can be realized under experimentally feasible conditions and remains robust against system dissipations and environment temperature. Therefore, the presented work provides a viable path toward generating single‐magnon sources and advancing quantum information processing with magnonic platforms.

Annalen der Physik•Mar 30, 2026•0 citations

Tunable magnon blockade in a magnon-qubit system with coherent and parametric driving

Yuchen Liu, Binhui Chang, Cong Cui +6 more

Abstract We study the magnon antibunching effect in the magnon-qubit coupling system under the joint action of coherent and parametric drives. The analysis and numerical results reveal the conventional magnon blockade (CMB) caused by the anharmonic level splitting induced by strong magnon–qubit coupling and the unconventional magnon blockade (UMB) induced by multipath destructive interference. Notably, in the strong-coupling regime, substituting the CMB condition into the optimal UMB condition yields a phase-tuned CMB-constrained UMB condition, which simultaneously realizes strong magnon antibunching and a high single-magnon occupation probability. This combines the high brightness afforded by CMB with the high purity provided by UMB. Furthermore, in the weak-coupling regime, coordinated tuning of the phase, detuning, parametric drive, and coupling strength induces destructive interference among distinct excitation pathways, thereby yielding the UMB effect. Importantly, even in the zero-coupling limit, the additional channel provided by the parametric drive can sustain this blockade. This flexibility removes the reliance on stringent strong-coupling constraints, offering a viable route toward tunable strong magnon antibunching.

Chinese Physics B•Oct 19, 2026•0 citations

Magnon blockade in magnon-qubit systems

Zhu-yao Jin, Jun Jing

A hybrid system established by the direct interaction between a magnon mode and a superconducting transmon qubit is used to realize a high-degree blockade for magnon. It is a fundamental way toward quantum manipulation at the level of a single magnon and preparation of single magnon sources. Through weakly driving the magnon and probing the qubit, our magnon-blockade proposal can be optimized when the transversal coupling strength between the magnon and qubit is equivalent to the detuning of the qubit and the probing field or that of the magnon and the driving field. Under this condition, the equal-time second-order correlation function ${g}^{(2)}(0)$ can be analytically minimized when the probing intensity is about three times the driving intensity. Moreover, the magnon blockade could be further enhanced by proper driving intensity and system decay rate, whose magnitudes outrange the current systems of cavity QED and cavity optomechanics. In particular, the correlation function achieves ${g}^{(2)}(0)\ensuremath{\sim}{10}^{\ensuremath{-}7}$, about two orders lower than that for the photon blockade in cavity optomechanics. Also, we discuss the effects on ${g}^{(2)}(0)$ from thermal noise and the extra longitudinal interaction between the magnon and qubit. Our optimized conditions for blockade are found to persist in these nonideal situations.

arXiv:2303.13823•Physical Review A•Nov 1, 2023•29 citations

Tunable magnon antibunching in a hybrid ferromagnet-superconductor system with two qubits

Xiyun Li, Xin Wang, Zhen Yu Wu +2 more

We explore a scheme to investigate the tunable magnon antibunching characteristics of the conventional magnon blockade (CMB) and the unconventional magnon blockade (UMB) in a hybrid ferromagnet-superconductor system. The magnon excited in the yttrium iron garnet is indirectly coupled to two qubits by eliminating two mutually perpendicular microwave cavity modes. In our paper, we relax the magnon-qubits detuning constraint. In two cases with and without magnon-qubits detuning, it is found that in the strong coupling regime CMB and UMB coexist in our system, and they can be regulated simultaneously by varying the magnon-qubits coupling strength ratio and the qubits detuning ratio. In the weak coupling regime, there exists only the UMB in the system. Without magnon-qubits detuning, the UMB shows a nonmonotonic dependence on the magnon-qubits coupling strength ratio. With magnon-qubits detuning, for the UMB, the magnon bunching effect and antibunching effect can be converted mutually by adjusting the magnon-qubits coupling strength ratio and the qubits detuning ratio. Moreover, changing the magnon-qubits coupling strength ratio and the qubits detuning ratio has a significant impact on the antibunching effect against the thermal magnon excitation. Our research results provide a theoretical scheme for the manipulation of magnon antibunching characteristics, and have important practical significance for the construction of a single magnon source.

Physical review. B./Physical review. B•Dec 29, 2021•43 citations

Conventional and unconventional magnon blockades in a qubit-magnon hybrid quantum system

Ye‐Jun Xu, Tian-Le Yang, Lei Lin +1 more

We investigate magnon statistics in a qubit-magnon hybrid quantum system in which an effective appreciable qubit-magnon coupling can be realized by exchanging virtual cavity photons. A conventional magnon blockade and two types of unconventional magnon blockades are proposed, respectively, based on three different physical mechanisms. We verify theoretically that a magnon blockade can occur in strong, weak, and moderate qubit-magnon coupling regimes. It is interesting that an asymmetry structure for magnon anti-bunching can be observed in the case of the moderate qubit-magnon coupling strength, especially where the quantum interference can significantly relax the requirement of the larger coupling strength between the qubit and magnon mode. All of the approximate analytical results for strong magnon anti-bunching are in good agreement with those obtained by numerical simulations. Our results provide a promising pathway for coherent manipulation in single magnon level, which has potential applications for quantum information processing and preparation of single magnon sources.

Journal of the Optical Society of America B•Jan 13, 2021•31 citations

Magnon blockade in a strongly coupled nonlinear cavity–magnon system

Zhong Ding, Yong‐Pan Gao, Yong Zhang

The quantum blockade effect is one of the important control methods for various quantum states. Recently, magnon has gradually become the focus of quantum device research due to its excellent properties such as stability, high spin density, and tunability. This study investigates the generation of conventional and unconventional single and double magnon blockades, as well as magnon-induced tunneling effects, in strongly nonlinearly coupled cavity–magnon systems. By adjusting the coupling strength and the driving field, we achieved single and double magnon blockades, along with magnon-induced tunneling effects. Interestingly, we found that the transition from a magnon blockade to magnon-induced tunneling can be controlled by modulating the driving field. To validate the feasibility of our model, we examined the impact of thermal noise at an experimental temperature of 20 mK. Our proposed scheme may offer a method to manipulate few-magnon states and holds potential applications in quantum communication and quantum information processing.

Journal of the Optical Society of America B•Dec 8, 2023•6 citations
Abstract Magnon blockade (MB) is a fundamental quantum phenomenon for generating single-magnon states, and has gradually become one of the candidates for quantum information processing. We extend existing blockade optimization schemes to a hybrid system consisting of a YIG micromagnet and a skyrmion, and propose a theoretical scheme for achieving MB on this platform. Under weak magnon probing and external driving of the skyrmion qubit, the second-order correlation function is analytically derived, and the optimal parameter conditions for both conventional and unconventional MB are identified. By appropriately adjusting the intensities of the driving and probing fields, the MB effect is significantly enhanced, multi-magnon excitations are effectively suppressed, and strong antibunching is achieved. Further analysis reveals that MB originates from two distinct physical mechanisms: conventional blockade induced by anharmonicity of the energy level structure, and unconventional blockade arising from quantum interference between different transition paths. On this platform, the two mechanisms coexist and can be synergistically controlled, and their cooperation yields a blockade effect superior to that of either mechanism alone. This work thus provides a feasible theoretical scheme for the effective manipulation of MB effects.
ABSTRACT We propose a scheme to realize magnon blockade in a hybrid system composed of a transmon‐type superconducting qubit directly coupled to the magnon mode of a single‐crystalline yttrium‐iron‐garnet sphere. By applying two‐tone driving to the qubit, we engineer an effective Hamiltonian for the magnon mode including both single‐magnon and two‐magnon interaction. Due to the destructive interference between two transition paths, the two‐magnon excitation is suppressed, and thus the unconventional magnon blockade can be achieved. We also demonstrate that the intrinsic anharmonicity of the qubit can be transferred to the magnon mode through their coherent hybridization, but this anharmonicity has almost no influence on the blockade effect. Through solving the second‐order correlation function analytically and numerically, we show that the scheme can be realized under experimentally feasible conditions and remains robust against system dissipations and environment temperature. Therefore, the presented work provides a viable path toward generating single‐magnon sources and advancing quantum information processing with magnonic platforms.
Abstract We study the magnon antibunching effect in the magnon-qubit coupling system under the joint action of coherent and parametric drives. The analysis and numerical results reveal the conventional magnon blockade (CMB) caused by the anharmonic level splitting induced by strong magnon–qubit coupling and the unconventional magnon blockade (UMB) induced by multipath destructive interference. Notably, in the strong-coupling regime, substituting the CMB condition into the optimal UMB condition yields a phase-tuned CMB-constrained UMB condition, which simultaneously realizes strong magnon antibunching and a high single-magnon occupation probability. This combines the high brightness afforded by CMB with the high purity provided by UMB. Furthermore, in the weak-coupling regime, coordinated tuning of the phase, detuning, parametric drive, and coupling strength induces destructive interference among distinct excitation pathways, thereby yielding the UMB effect. Importantly, even in the zero-coupling limit, the additional channel provided by the parametric drive can sustain this blockade. This flexibility removes the reliance on stringent strong-coupling constraints, offering a viable route toward tunable strong magnon antibunching.
A hybrid system established by the direct interaction between a magnon mode and a superconducting transmon qubit is used to realize a high-degree blockade for magnon. It is a fundamental way toward quantum manipulation at the level of a single magnon and preparation of single magnon sources. Through weakly driving the magnon and probing the qubit, our magnon-blockade proposal can be optimized when the transversal coupling strength between the magnon and qubit is equivalent to the detuning of the qubit and the probing field or that of the magnon and the driving field. Under this condition, the equal-time second-order correlation function g(2)(0){g}^{(2)}(0)g(2)(0) can be analytically minimized when the probing intensity is about three times the driving intensity. Moreover, the magnon blockade could be further enhanced by proper driving intensity and system decay rate, whose magnitudes outrange the current systems of cavity QED and cavity optomechanics. In particular, the correlation function achieves ${g}^{(2)}(0)\ensuremath{\sim}{10}^{\ensuremath{-}7}$, about two orders lower than that for the photon blockade in cavity optomechanics. Also, we discuss the effects on g(2)(0){g}^{(2)}(0)g(2)(0) from thermal noise and the extra longitudinal interaction between the magnon and qubit. Our optimized conditions for blockade are found to persist in these nonideal situations.
We explore a scheme to investigate the tunable magnon antibunching characteristics of the conventional magnon blockade (CMB) and the unconventional magnon blockade (UMB) in a hybrid ferromagnet-superconductor system. The magnon excited in the yttrium iron garnet is indirectly coupled to two qubits by eliminating two mutually perpendicular microwave cavity modes. In our paper, we relax the magnon-qubits detuning constraint. In two cases with and without magnon-qubits detuning, it is found that in the strong coupling regime CMB and UMB coexist in our system, and they can be regulated simultaneously by varying the magnon-qubits coupling strength ratio and the qubits detuning ratio. In the weak coupling regime, there exists only the UMB in the system. Without magnon-qubits detuning, the UMB shows a nonmonotonic dependence on the magnon-qubits coupling strength ratio. With magnon-qubits detuning, for the UMB, the magnon bunching effect and antibunching effect can be converted mutually by adjusting the magnon-qubits coupling strength ratio and the qubits detuning ratio. Moreover, changing the magnon-qubits coupling strength ratio and the qubits detuning ratio has a significant impact on the antibunching effect against the thermal magnon excitation. Our research results provide a theoretical scheme for the manipulation of magnon antibunching characteristics, and have important practical significance for the construction of a single magnon source.
We investigate magnon statistics in a qubit-magnon hybrid quantum system in which an effective appreciable qubit-magnon coupling can be realized by exchanging virtual cavity photons. A conventional magnon blockade and two types of unconventional magnon blockades are proposed, respectively, based on three different physical mechanisms. We verify theoretically that a magnon blockade can occur in strong, weak, and moderate qubit-magnon coupling regimes. It is interesting that an asymmetry structure for magnon anti-bunching can be observed in the case of the moderate qubit-magnon coupling strength, especially where the quantum interference can significantly relax the requirement of the larger coupling strength between the qubit and magnon mode. All of the approximate analytical results for strong magnon anti-bunching are in good agreement with those obtained by numerical simulations. Our results provide a promising pathway for coherent manipulation in single magnon level, which has potential applications for quantum information processing and preparation of single magnon sources.
The quantum blockade effect is one of the important control methods for various quantum states. Recently, magnon has gradually become the focus of quantum device research due to its excellent properties such as stability, high spin density, and tunability. This study investigates the generation of conventional and unconventional single and double magnon blockades, as well as magnon-induced tunneling effects, in strongly nonlinearly coupled cavity–magnon systems. By adjusting the coupling strength and the driving field, we achieved single and double magnon blockades, along with magnon-induced tunneling effects. Interestingly, we found that the transition from a magnon blockade to magnon-induced tunneling can be controlled by modulating the driving field. To validate the feasibility of our model, we examined the impact of thermal noise at an experimental temperature of 20 mK. Our proposed scheme may offer a method to manipulate few-magnon states and holds potential applications in quantum communication and quantum information processing.