Spectral flow of fermions in the $\CP^2$ (anti-)instanton, and the sphaleron with vanishing topological charge

Yuki Amari, Nobuyuki Sawado, Shintaro Yamamoto

The spectral flow is ubiquitous in the physics of soliton-fermion interacting systems. We study the spectral flows related to a continuous deformation of background soliton solutio…