2023 Fiscal Year Annual Research Report
Expanded bandwidth for production of the optical vortex by cyclotron radiation
| Project/Area Number |
18K03466
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| Research Institution | Osaka Metropolitan University |
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Principal Investigator |
ガーモン サバンナスターリング 大阪公立大学, 大学院理学研究科, 准教授 (30733860)
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| Project Period (FY) |
2018-04-01 – 2024-03-31
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| Keywords | optical vortex / waveguide / non-Markovian decay / dynamical control / radiation damping / exceptional point / bound state in continuum |
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| Outline of Annual Research Achievements |
In previous years, I have published four works that explore various protocols and ideas for quantum dynamical control in a model-independent context. This included one work [1] particularly focused on the dynamics when the characteristic frequency of a quantum emitter inside a waveguide matches the cutoff frequency inside of that waveguide, which is a universal result. A key factor influencing the dynamics in this case is an exceptional point (EP) appearing directly at the cutoff.
In this year, I have extended this work to the specific case of the classical radiation damping of a charged particle undergoing cyclotron motion inside a rectangular waveguide [2]. Note that one of the main results of our paper Ref. [2] is to show that the quantum and classical cases can be treated almost analogously. The final work on the production of the optical vortex in a cylindrical waveguide will be published in the near future. And a separate work on the general problem of radiation damping in generic classical systems will also be published in the future.
[1] Phys. Rev. Research 3, 033029 (2021)
[2] PTEP 2024, 033A02 (2024)
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