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pro vyhledávání: '"Park, Hee Chul"'
The concept of Chern insulators is one of the most important buliding block of topological physics, enabling the quantum Hall effect without external magnetic fields. The construction of Chern insulators has been typically through an guess-and-confir
Externí odkaz:
http://arxiv.org/abs/2407.16225
Autor:
Lee, Donggeun, Jeon, Seung-Woo, Yi, Chang-Hwan, Kim, Yang-Hee, Choi, Yeeun, Lee, Sang-Hun, Cha, Jinwoong, Shim, Seung-Bo, Suh, Junho, Kim, Il-Young, Kang, Dongyeon Daniel, Jung, Hojoong, Jeong, Cherlhyun, Ahn, Jae-pyoung, Park, Hee Chul, Han, Sang-Wook, Kim, Chulki
The significance of mass spectrometry lies in its unparalleled ability to accurately identify and quantify molecules in complex samples, providing invaluable insights into molecular structures and interactions. Here, we leverage diamond nanostructure
Externí odkaz:
http://arxiv.org/abs/2406.01963
The complex eigenenergies and non-orthogonal eigenstates of non-Hermitian systems exhibit unique topological phenomena that cannot appear in Hermitian systems. Representative examples are the non-Hermitian skin effect and exceptional points. In a two
Externí odkaz:
http://arxiv.org/abs/2405.17749
Autor:
Park, Jagang, Lee, Kyungmin, Zhang, Ruo-Yang, Park, Hee-Chul, Ryu, Jung-Wan, Cho, Gil Young, Lee, Min Yeul, Zhang, Zhaoqing, Park, Namkyoo, Jeon, Wonju, Shin, Jonghwa, Chan, C. T., Min, Bumki
Over the last few decades, the prominent strategies for controlling spontaneous emission has been the use of resonant or space-periodic photonic structures. This approach, initially articulated by Purcell and later expanded upon by Yablonovitch in th
Externí odkaz:
http://arxiv.org/abs/2404.13287
Image denoising is essential for removing noise in images caused by electric device malfunctions or other factors during image acquisition. It helps preserve image quality and interpretation. Many convolutional autoencoder algorithms have proven effe
Externí odkaz:
http://arxiv.org/abs/2401.06367
We derive symmetry-based conditions for tight-binding Hamiltonians with flatbands to have compact localized eigenstates occupying a single unit cell. The conditions are based on unitary operators commuting with the Hamiltonian and associated with loc
Externí odkaz:
http://arxiv.org/abs/2308.14997
Publikováno v:
Physica Status Solidi b, 261, 2300379 (2024)
We investigate the effect of elastic strain on a Mach-Zehnder (MZ) interferometer created by graphene p-n junction in quantum Hall regime. We demonstrate that a Gaussian-shaped nanobubble causes detuning of the quantum Hall conductance oscillations a
Externí odkaz:
http://arxiv.org/abs/2308.11954
Eigenstate coalescence in non-Hermitian systems is widely observed in diverse scientific domains encompassing optics and open quantum systems. Recent investigations have revealed that adiabatic encircling of exceptional points (EPs) leads to a nontri
Externí odkaz:
http://arxiv.org/abs/2306.06967
Autor:
Kim, Yung, Park, Hee Chul, Kyung, Minwook, Lee, Kyungmin, Ryu, Jung-Wan, You, Oubo, Zhang, Shuang, Min, Bumki, Park, Moon Jip
Line excitations in topological phases are a subject of particular interest because their mutual linking structures encode robust topological information of matter. It has been recently shown that the linking and winding of complex eigenenergy string
Externí odkaz:
http://arxiv.org/abs/2303.13721
Autor:
Park, Jagang, Park, Hee Chul, Lee, Kyungmin, Shin, Jonghwa, Ryu, Jung-Wan, Jeon, Wonju, Park, Namkyoo, Min, Bumki
Lyubarov et al. (Research Articles, 22 July 2022, p. 425) claim that the spontaneous emission rate of an atom vanishes at the momentum gap edges of photonic Floquet media. We show that their theoretical prediction is based on assumptions that result
Externí odkaz:
http://arxiv.org/abs/2211.14832