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arXiv · 2608.17392

Left-invariant Rarita-Schwinger fields on 3-dimensional Lie groups

Soma Ohno
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Abstract

We classify left-invariant Rarita-Schwinger fields on 2- and 3-dimensional Lie groups with left-invariant Riemannian metrics. The left-invariant Rarita-Schwinger equation is reduced to an algebraic system on the associated metric Lie algebra. We show that, in dimension 2, non-trivial examples occur only in the flat abelian case. In dimension 3, apart from the flat abelian case, the only non-trivial examples occur on SU(2) equipped with a special left-invariant metric, for which the space of left-invariant Rarita-Schwinger fields has complex dimension 2. This metric is a Berger metric on $S^3$.

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Soma Ohno. 2026-08-18. Left-invariant Rarita-Schwinger fields on 3-dimensional Lie groups. https://arxiv.org/abs/2608.17392

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