2 papers
cond-mat.mes-hall2026
Singular flat bands in three dimensions: Landau level spreading, quantum geometry, and Weyl reconstruction
Takuto Kawakami, Yuji Igarashi, Mikito Koshino
We theoretically investigate three-dimensional singular flat band systems, focusing on their quantum geometric properties and response to external magnetic fields. As a representat…
hep-th2025
Functional Renormalization Group Flows and Gauge Consistency in QED
Yoshio Echigo, Yuji Igarashi, Katsumi Itoh +2
We consider quantum electrodynamics with chiral four-Fermi interactions in the functional renormalization group approach. In gauge theories, the functional flow equation for the ef…