The Atiyah-Patodi-Singer index and domain-wall fermion Dirac operators

Published 4 Oct 2019 in math.DG, hep-lat, and hep-th | (1910.01987v3)

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.

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