2018 Fiscal Year Annual Research Report
| Project/Area Number |
16F16325
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| Research Institution | Tohoku University |
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Principal Investigator |
Bauer Gerrit 東北大学, 金属材料研究所, 教授 (10620213)
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| Co-Investigator(Kenkyū-buntansha) |
ELYASI MEHRDAD 東北大学, 金属材料研究所, 外国人特別研究員
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| Project Period (FY) |
2016-11-07 – 2019-03-31
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| Keywords | Magnon / Cavity / Microwave / Nonlinearity / Soliton / Topology |
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| Outline of Annual Research Achievements |
The nonlinearity of spin waves in the context of microwave cavity magnonic was finalized and the findings were presented to the community at SPICE workshop in Mainz (2018) and Max-Planck Light in Erlangen (2018). The corresponding manuscript is in its final iterations between the authors M. Elyasi, Ya. M. Blanter and G. E. W. Bauer, and is soon to be submitted to a high impact factor journal. The results map out the steady states features, such as entanglement and nonclassicality, in the nonlinear phase space of the strongly driven cavity photon-magnon polaritons, using classical (from solution of stochastic equations of motion) and quantum mechanical (from solution of master equations) analysis and computation. The findings pave the way for implementing spin waves in quantum information.
The other parallel direction considering nonlinearities in a topologically nontrivial spin lattice equivalent of Haldane model for magnons, led to a complete classification of self-localized spin wave modes, i.e. solitons, in static and dynamic configurations of the lattice. A unique observed feature was a nonlinearity induced topological phase change from nontrivial to trivial by increasing the power of soliton. The reason for this phase change was investigated and formed an important part of the study, which was published as Phys. Rev. B 99, 134402 (2019).
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| Research Progress Status |
平成30年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
平成30年度が最終年度であるため、記入しない。
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