The Atiyah-Patodi-Singer index and domain-wall fermion Dirac operators
arXiv:1910.01987 · doi:10.1007/s00220-020-03806-0
Abstract
We introduce a mathematician-friendly formulation of the physicist-friendly derivation of the Atiyah-Patodi-Singer index of our previous paper. Our viewpoint sheds some new light on the interplay among the Atiyah-Patodi-Singer boundary condition, domain-wall fermions, and edge modes.