研究課題/領域番号 |
21K13847
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研究種目 |
若手研究
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配分区分 | 基金 |
審査区分 |
小区分13010:数理物理および物性基礎関連
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研究機関 | 東北大学 |
研究代表者 |
ELYASI MEHRDAD 東北大学, 材料科学高等研究所, 特任助教 (30840326)
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研究期間 (年度) |
2021-04-01 – 2024-03-31
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研究課題ステータス |
交付 (2022年度)
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配分額 *注記 |
4,550千円 (直接経費: 3,500千円、間接経費: 1,050千円)
2023年度: 1,040千円 (直接経費: 800千円、間接経費: 240千円)
2022年度: 1,690千円 (直接経費: 1,300千円、間接経費: 390千円)
2021年度: 1,820千円 (直接経費: 1,400千円、間接経費: 420千円)
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キーワード | Magnons / Nonlinearity / Quantum information / Stochastic switching / Heterostructures / Parametric excitation |
研究開始時の研究の概要 |
I will theoretically pursue different aspects of spin waves useful for quantum information. I will invoke the unique dispersion of spin waves and the inherent nonlinearities for proposals to unearth resources such as entanglement, and design hybrid systems for implementation of those resources for quantum information processing and communication.
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研究実績の概要 |
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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現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
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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今後の研究の推進方策 |
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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