论文标题
具有四极相互作用的费米液体中的特殊点
Exceptional points in Fermi liquids with quadrupolar interactions
论文作者
论文摘要
我们在具有四极相互作用的费米液体的集体模式光谱中表明了非铁毒素的存在，称为特殊点。通过仔细分析动态四极敏感性的分析性能，我们表明，在弱吸引的区域，两种稳定的集体模式合并到了一个特殊的点。我们完全表征了这种奇异性，明确显示了其拓扑特性。还讨论了实验签名。
We show the existence of non-Hermitian degeneracies, known as exceptional points, in the collective mode spectrum of Fermi liquids with quadrupolar interactions. Through a careful analysis of the analytic properties of the dynamic quadrupolar susceptibility, we show that, in the weak attractive region, two stable collective modes coalesce to an exceptional point. We completely characterize this singularity, explicitly showing its topological properties. Experimental signatures are also discussed.
