标题： 多终端超导-正常金属结中例外点的特征 显示英文标题

标题： Signatures of exceptional points in multiterminal superconductor-normal metal junctions

摘要： 我们研究了一个非厄米的多终端超导-正常系统，目的是识别例外点的实验特征。 我们集中于一个最简单的设定：单个自旋能级、自旋相关的正常引线以及非共线磁场。 这个系统同时拥有拓扑保护和对称保护的例外点。 利用精确的输运形式论，我们表明例外点可以通过安德烈夫态的光谱来观测到，但它们对约瑟夫森电流的影响较小。 我们还论证了这些发现同样适用于相互作用的情况。 显示英文摘要

摘要： We study a non-Hermitian, multiterminal superconducting-normal system in order to identify experimental signatures of exceptional points. We focus on a minimal setting with a single spinful level, spin-dependent normal leads, and a noncollinear magnetic field. This system hosts both topologically-protected, as well as symmetry-protected exceptional points. Using an exact transport formalism, we show that the exceptional points are visible through spectroscopy of the Andreev states, but that they have a minor effect on the Josephson current. We also argue that these findings hold with interactions.