PDF ダウンロード スケジュール 0 [We-L-37] Symmetry-Protected Exceptional Rings in Two Dimensions *Tsuneya Yoshida1, Robert Peters2, Norio Kawakami2, Yasuhiro Hatsugai1 (1. University of Tsukuba(Japan), 2. Kyoto University(Japan)) キーワード:Correlated topological systems, Non-Hermitian topology