Magnons for quantum information

我们跟进并完成了与实验小组的几次合作，关于磁振子非线性及其在量子信息等新兴技术中的应用。在合作与Toeno货车德萨尔组在TU德尔夫特，我们研究了自旋波的相互作用在异质结的YIG薄膜和金刚石托管收集的NV中心自旋。我们表明，磁振子非线性可用于宽带磁强计和NV中心自旋的相干控制。这项工作发表在Nat. Commun上。14，490（2023）.在与北京的Haiming Yu小组的合作中，我们深入研究了纳米线和薄膜异质结构中磁振子之间的相互作用，并证明了层间三磁振子相互作用，该相互作用可用于产生在量子信息应用中有用的非局域关联。这项工作发表在Phys.Rev.Lett上。130，046701（2023）。在与东京大学斋藤英治研究组的合作中，我们证明了YIG磁性元件中的三个磁振子散射可以用于铁磁共振的持续相干。目前正在审查这项工作。在另一项工作出版的物理。130，046703（2023），与UCL（伦敦）的Hidekazu Kurebayashi小组合作，我们证明了三个磁振子散射可以用于控制磁振子极化激元。

We followed through and completed several collaborations with experimental groups, on magnon nonlinearity and its applications in emerging technologies such as quantum information. In collaboration with Toeno van der Sar group at TU Delft, we investigated interaction of spin waves in a heterostructure of a YIG thin film and a diamond hosting a collection of NV center spins. We showed that the magnon nonlinearity can be used for wideband magnetometry and a coherent control of NV center spins. This work was published in Nat. Commun. 14, 490 (2023).In a collaboration with Haiming Yu group in Beijing, we thoroughly investigated the interactions between magnons in a heterostructure of a nanowire and a thin film, and demonstrated an interlayer three magnon interaction, which can be used for generation of non-local correlations useful in quantum information applications. This work was published in Phys. Rev. Lett. 130, 046701 (2023). In collaboration with Eiji Saitoh group at Univ. of Tokyo, we showed that three magnon scattering in an YIG magnetic element can be used for persistent coherence of ferromagnetic resonance. This work is currently under review. In another work published as Phys. Rev. Lett. 130, 046703 (2023), in collaboration with Hidekazu Kurebayashi group at UCL (London), we showed that three magnon scattering can be used for controlling magnon polaritons.