标题： 激子皮肤效应 显示英文标题

标题： Excitonic skin effect

摘要： 我们证明，强相互作用与依赖于能带的虚数矢量势相结合会导致电子-空穴对的边界局域化，我们将其称为激子皮肤效应。 在一个具有层特异性增益/损耗和面内磁场的双层系统中，激子会经历一个净虚数矢量势，导致电子-空穴对的方向性放大。 包括最近邻相互作用会导致一个非厄米玻色子基塔耶夫模型，在该模型中，配对效应随着系统的大小呈指数增长，揭示了相互作用系统中一种独特的临界皮肤效应。 我们的框架适用于原子和电子平台，并可在当前实验中直接测试。 这些结果还提供了一条探索张量规范场非厄米类比的途径。 显示英文摘要

摘要： We show that strong interactions combined with band-dependent imaginary vector potentials give rise to boundary localization of particle-hole pairs, which we term the excitonic skin effect. In a bilayer system with layer-specific gain/loss and an in-plane magnetic field, excitons experience a net imaginary vector potential, resulting in directional amplification of particle-hole pairs. Including nearest-neighbor interactions leads to a non-Hermitian bosonic Kitaev model, where the pairing effects grow exponentially with the size of the system, revealing a unique form of critical skin effect in interacting systems. Our framework applies to both atomic and electronic platforms and is directly testable in current experiments. These results also provide a route to explore non-Hermitian analogs of tensor gauge fields.