铁磁-超导体系中磁振子的非经典效应

Nonclassical effects of magnon in a hybrid ferromagnet-superconductor system

性能互补的物理体系所构成的混合量子系统集合了不同量子体系的优势,比单一量子系统更适合执行特定的任务.近期,基于磁振子的混合系统以其独特的优势为量子信息科学提供了一系列优质平台.磁振子是磁性材料集体激励所产生的自旋波量子,具有高自旋密度、低耗散速率以及易于调控等优点,并且可以与微波光子、光学光子、声子、超导量子比特等不同的量子体系耦合,展现出良好的兼容性和可扩展性.磁振子与超导量子比特所构成的铁磁-超导系统,集合了磁振子与超导量子比特的互补优势,在理论和实验上得到了广泛研究.本文综述了量子光学领域中铁磁-超导量子系统的发展过程及研究进展,并对该领域的未来发展方向进行展望.

Hybrid quantum systems,composed of distinct physical components with complementary functionalities,have multitasking capabilities and thus may be better suited than other systems for specific tasks.Recently,hybrid systems based on magnons have provided a series of high-quality platforms for quantum information science with their unique advantages.Magnons,spin wave quanta generated by the collective excitation of magnetic materials,have high spin density,low dissipation rate,and flexible tunability and can be coupled with microwave photons,optical photons,phonons,and superconducting qubits,showing exceptional compatibility and scalability.The ferromagnet-superconducting system is composed of the magnon and superconducting qubit,thus combining their complementary advantages,and has been investigated extensively in theory and experiments.Here,we provide an overview of the development and research progress of the ferromagnet-superconductor system in quantum optics and prospects of future development in this field.