Papers
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"Bulk-edge correspondence for nonlinear eigenvalue problems"
Phys. Rev. Lett. 132, 126601 (2024)
journals.aps.org/prl/abstract/10.1103/PhysRevLett.132.126601
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"A symmetry-protected exceptional ring in a photonic crystal with negative index media"
Nanophotonics, DOI: 10.1515/nanoph-2022-0747
https://www.degruyter.com/document/doi/10.1515/nanoph-2022-0747/html
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"Topological band theory of a generalized eigenvalue problem with Hermitian matrices: Symmetry-protected exceptional rings with emergent symmetry"
Phys. Rev. B 104, L121105 (2021).
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.104.L121105
International Conference
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"Analysis of the bulk-boundary correspondence in nonlinear eigenvalue problems by the auxiliary eigenvalues"
2024 APS March Meeting
USA, Minneapolis, Mar. 4-8, 2024 (Oral)
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"Non-Hermitian topology in a photonic crystal composed of negative index media"
EP2DS-25&MSS-21
France, Grenoble, Jul. 9-14, 2023 (Poster)
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"Emergence of the non-Hermitian topology in generalized eigenvalue problems with Hermitian matrices"
2023 APS March Meeting
USA, Las Vegas, Mar. 6-10, 2023 (Oral)
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"Generalized eigenvalue problems and non-Hermitian topology without non-Hermitian matrices"
Novel Quantum States in Condensed Matter 2022 (NQS2022)
Japan, Kyoto, Nov. 7-11, 2022 (Poster)
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"Symmetry-Protected Exceptional Rings in the System Described by the Generalized Eigenvalue Problem"
2nd Global Summit on Condensed Matter Physics (CONMAT2022)
Online, Oct. 17-19,2022 (Invited)
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"Symmetry-protected exceptional rings induced by negative index"
15th Asia Pacific Physics Conference (APPC15)
Online, Aug. 21-26, 2022 (Oral)
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"Non-Hermitian Topology of Optical Metamaterials with Negative Permittivity and Permeability"
29th International Conference on Low Temperature Physics (LT29)
Online, Aug. 18-24, 2022 (Poster)
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"Non-Hermitian topology in the generalized eigenvalue problem with indefinite Hermitian matrices"
Bulk-Edge/Boundary Correspondence 2022
Japan, Tsukuba, Feb. 11-13, 2022 (Poster)
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"Generalized eigenvalue problem with indefinite Hermitian matrices"
EP2DS-24/MSS-20
Online, Oct. 31-Nov. 5, 2021 (Poster)
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"Non-Hermitian topological band structure derived from the generalized eigenvalue problem with indefinite Hermitian matrices and non-Hermitian topological band structure"
International Conference on Discrete Geometric Analysis for Materials Design
Online, Sep. 26-29 2021 (Poster)
Takuma Isobe, Shuhei Oono, Tomonari Mizoguchi, and Yasuhiro Hatsugai
"Band inversion in the honeycomb photonic crystal"
2018 Joint Symposium on Energy Materials Science and Technology
Japan, Tsukuba, Mar. 8-9, 2018 (Poster)
Takuma Isobe, Shuhei Oono, Tomonari Mizoguchi, and Yasuhiro Hatsugai
"Chern number and edge modes in 2d honeycomb photonic crystals"
TGSW 2018 Japan, Tsukuba, Sep. 20-22, 2018 (Poster)
Domestic Conference
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"Exceptional points induced by the nonlinearity of eigenvalues"
2024 Spring Meeting, The Physical Society of Japan
Sendai, Mar. 18-21, 2024 (Oral)
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"Analysis of the nonlinear eigenvalue problem by the indirect bulk-boundary correspondence"
78th Annual Meeting, The Physical Society of Japan
Sendai, Autumn. 16-19, 2023 (Oral)
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"Nonlinearity of eigenvalues and the chiral zero mode"
2023 Spring Meeting, The Physical Society of Japan
Online, Mar. 22-25, 2023 (Poster)
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"Bulk-boundary correspondence in a system with the nonlinearity of eigenvalues"
2022 Autumn Meeting, The Physical Society of Japan
Tokyo, Sep. 12-15 (Poster)
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"Symmetry-protected exceptional rings in the optical metamaterial"
77th Annual Meeting (2022), The Physical Society of Japan
Online, Mar. 15-19 2022 (Poster)
Takuma Isobe, Tsuneya Yoshida, and Yasuhiro Hatsugai
"Topological band theory of generalized eigenvalue problem with indefinite Hermitian matrices"
2021 Autumn Meeting, The Physical Society of Japan
Online, Sep. 20-23 2021 (Oral)
Takuma Isobe, Shuhei Oono, Tomonari Mizoguchi, and Yasuhiro Hatsugai
"Bulk-edge correspondence of honeycomb photonic crystal"
3rd Research conference for Grant-in-Aid for Scientific Research S (17H06138)
Univ. of Tsukuba, May 19-20, 2018 (Poster)