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gr-qc2026
Soliton solution of a gravitating chiral quark soliton model: dynamical fermion and Dirac-sea in general relativity
Ryoma Mizutani, Daiki Niiyama, Nobuyuki Sawado
In this paper, we study Einstein-Dirac system based on a Dirac fermion coupled with a nonlinear chiral field on static spherically symmetric spacetime. Gravitational effects on the…
hep-th2026
Topological Charge Asymmetry in a Skyrmion-Fermion Coupled System
Yuki Amari, Nobuyuki Sawado, Shintaro Yamamoto
Topology plays a central role in classifying solitonic configurations in field theories, providing robustness and a nonperturbative label, the so-called topological charge . In…