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Danho Ahn on Muck Rack

Danho Ahn

As seen in: Physical Review B
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Articles

Electromagnetic field in a cavity induced by gravitational waves

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By Danho Ahn, Yeong-Bok Bae, Sang Hui Im, Chan Beom Park
| Physical Review B
The detection method of gravitational waves (GW) using electromagnetic (EM) cavities has garnered significant attention in recent years. This paper thoroughly examines the analysis for the perturbation of the EM field and raises some issues in the existing literature. Our work demonstrates that the rigidity condition imposed on the material, as provided in the literature, is inappropriate due to its reliance on a gauge-dependent quantity that cannot be controlled experimentally.
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Biaxially Textured ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7\ensuremath{-}x}$ Microwave Cavity in a High Magnetic Field for a Dark-Matter Axion Search

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By HeeSu Byun, Danho Ahn, Ohjoon Kwon, Woohyun Chung
| Physical Review B
Abstract A high-quality (Q)-factor microwave resonator in the presence of a strong magnetic field can have a wide range of applications, such as in axion dark matter searches where the two aspects must coexist to enhance the experimental sensitivity. We introduce a polygon-shaped cavity design with biaxially textured YBa2Cu3O7−x superconducting tapes covering the entire inner wall.
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