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Balanced metrics for Kähler-Ricci solitons and quantized Futaki invariants

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We show that a Kähler-Ricci soliton on a Fano manifold can always be smoothly approximated by a sequence of relative anticanonically balanced metrics, also called quantized Kähler-Ricci solitons. The proof… Click to show full abstract

We show that a Kähler-Ricci soliton on a Fano manifold can always be smoothly approximated by a sequence of relative anticanonically balanced metrics, also called quantized Kähler-Ricci solitons. The proof uses an equivariant version of Berezin-Toeplitz quantization to extend a strategy due to Donaldson, and can be seen as the quantization of a method due to Tian and Zhu, using quantized Futaki invariants as obstructions for quantized Kähler-Ricci solitons. As a by-product, we show that a KählerEinstein Fano manifold does not necessarily admit anticanonically balanced metrics in the usual sense when its automorphism group is not discrete.

Keywords: ricci solitons; quantized futaki; balanced metrics; hler; hler ricci

Journal Title: Journal of Functional Analysis
Year Published: 2022

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