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arXiv · 2003.11255

Manifolds with many Rarita-Schwinger fields

Christian Baer·Rafe Mazzeo
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Abstract

The Rarita-Schwinger operator is the twisted Dirac operator restricted to 3/2-spinors. Rarita-Schwinger fields are solutions of this operator which are in addition divergence-free. This is an overdetermined problem and solutions are rare; it is even more unexpected for there to be large dimensional spaces of solutions. In this paper we prove the existence of a sequence of compact manifolds in any given dimension greater than or equal to 4 for which the dimension of the space of Rarita-Schwinger fields tends to infinity. These manifolds are either simply connected K\"ahler-Einstein spin with negative Einstein constant, or products of such spaces with flat tori. Moreover, we construct Calabi-Yau manifolds of even complex dimension with more linearly independent Rarita-Schwinger fields than flat tori of the same dimension.

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Christian Baer, Rafe Mazzeo. 2020-03-25. Manifolds with many Rarita-Schwinger fields. https://doi.org/10.1007/s00220-021-04030-0

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