We examine Higgs bundles for non-compact real forms of $SO(4,\mathbb{C})$ and the isogenous complex group $SL(2,\mathbb{C}) \times SL(2,\mathbb{C})$. This involves a study of non-regular fibers in the corresponding Hitchin fibrations and provides interesting examples of non-abelian spectral data.

中文翻译：

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具有奇异光谱曲线的正交希格斯束

我们检查了希格斯束中非紧凑实型$ SO（4，\ mathbb {C}）$和同质复杂群$ SL（2，\ mathbb {C}）\ times SL（2，\ mathbb {C} ）$。这涉及到对相应的Hitchin纤维中非规则纤维的研究，并提供了非阿贝尔光谱数据的有趣示例。