Degeneration of Calabi-Yau metrics and canonical basis

Abstract

For polarised degenerations of Calabi-Yau manifolds whose essential skeleton has dimension $1\le m\le n$, we show that the $C^0$ potential theoretic limit of the Calabi-Yau metrics agrees with the non-archimedean Calabi-Yau metric on the Berkovich analytification. Moreover, this limit data can be encoded into the unique minimiser of the Kontorovich functional of an optimal transport problem, under some algebro-geometric assumptions on the existence of a canonical basis of sections for tensor powers of the polarisation line bundle.