High-fidelity topological quantum state transfersin a cavity-magnon system
Xi-Xi Bao(包茜茜)1, Gang-Feng Guo(郭刚峰)1, Xu Yang(杨煦)1, and Lei Tan(谭磊)1,2,†
1. Lanzhou Center for Theoretical Physics, Key Laboratory of Theoretical Physics of Gansu Province, Lanzhou University, Lanzhou 730000, China; 2. Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China
Abstract We propose a scheme for realizing high-fidelity topological state transfer via the topological edge states in a one-dimensional cavity-magnon system. It is found that the cavity-magnon system can be mapped analytically into the generalized Su-Schrieffer-Heeger model with tunable cavity-magnon coupling. It is shown that the edge state can be served as a quantum channel to realize the photonic and magnonic state transfers by adjusting the coupling strength between adjacent cavity modes. Further, our scheme can realize the quantum state transfer between photonic state and magnonic state by changing the cavity-magnon coupling strength. With the numerical simulation, we quantitatively show that the photonic, magnonic and magnon-to-photon state transfers can be achieved with high fidelity in the cavity-magnon system. Spectacularly, three different types of quantum state transfer schemes can be even transformed into each other in a controllable fashion. The Su-Schrieffer-Heeger model based on the cavity-magnon system provides us a tunable platform to engineer the transport of photon and magnon, which may have potential applications in topological quantum processing.
Fund: This work was supported by the National Natural Science Foundation of China (Grant Nos.11874190, 61835013, and 12047501) and the Supercomputing Center of Lanzhou University.
Corresponding Authors:
Lei Tan
E-mail: tanlei@lzu.edu.cn
Cite this article:
Xi-Xi Bao(包茜茜), Gang-Feng Guo(郭刚峰), Xu Yang(杨煦), and Lei Tan(谭磊) High-fidelity topological quantum state transfersin a cavity-magnon system 2023 Chin. Phys. B 32 080301
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