2022 Fiscal Year Research-status Report
Magnons for quantum information
| Project/Area Number |
21K13847
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| Research Institution | Tohoku University |
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Principal Investigator |
ELYASI MEHRDAD 東北大学, 材料科学高等研究所, 特任助教 (30840326)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | Magnons / Nonlinearity / Quantum information / Stochastic switching / Heterostructures |
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| Outline of Annual Research Achievements |
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.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The progress on the collaborations with experimentalists based on the magnon nonlinearities was beyond the expectations. I was able to provide theoretical support for five different works, with three already published, one under review, and one ready for submission. The publications were all in impactful journals, two PRL and one Nat. Commun.. However, the investment on these collaborations, hindered purely theoretical publications. Nevertheless, the balance has been already regained and in addition to new collaborations with experimentalists, theoretical works on few different topics including theory of in-situ magnon quantum state memory using nonlinearities are nearly prepared for submission.
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| Strategy for Future Research Activity |
I will finalize the theoretical paper on long lived memory for quantum state of ferromagnetic resonance using nonzero wavevector magnons and three magnon interaction. The aim is to submit this paper to Phys. Rev. Lett.. I will also finalize the theoretical study on the impact of magnon nonlinearities on the stochastic switching of magnetization in magnetic tunnel junctions. The experiment-theory paper on the same topic in collaboration with Shunsuke Fukami group at Tohoku University is ready for submission. In collaboration with Yaroslav Blanter at TU Delft, we will finalize the study on the limits of quantum measurement of magnon state using spin pumping and inverse spin Hall effect and prepare the work for publication. I will also follow up with the experimental collaborators on next steps in the projects that we already finalized and published.
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| Causes of Carryover |
This amount will be used for a one month visit to Delft University of Technology, the Netherlands, for collaboration with Prof. Yaroslav Blanter.
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[Journal Article] Nonlocal Detection of Interlayer Three-Magnon Coupling2023
Author(s)
Sheng Lutong、Elyasi Mehrdad、Chen Jilei、He Wenqing、Wang Yizhan、Wang Hanchen、Feng Hongmei、Zhang Yu、Medlej Israa、Liu Song、Jiang Wanjun、Han Xiufeng、Yu Dapeng、Ansermet Jean-Philippe、Bauer Gerrit E.?W.、Yu Haiming
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Journal Title
Physical Review Letters
Volume: 130
Pages: 046701
DOI
Peer Reviewed / Open Access / Int'l Joint Research
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