论文标题
在非热三波段BCS模型中，Meissner效应在零特殊点上的分解
Breakdown of the Meissner effect at the zero exceptional point in non-Hermitian two-band BCS model
论文作者
论文摘要
已知在参数空间的特殊点，在复杂场理论中连续对称性的自发对称性破坏可以表现出有趣的现象，例如希格斯机制的崩溃。在这项工作中，我们通过路径积分从非热的两波段BCS模型中得出复杂的Ginzburg-Landau模型，并研究了其自发的对称性破坏。我们发现，类似于希格斯机制，复杂的金茨堡 - 兰道模型的迈斯纳效应也在特殊点上分解，而间隙参数保持有限。
The spontaneous symmetry breaking of a continuous symmetry in complex field theory at the exceptional point of the parameter space is known to exhibit interesting phenomena, such as the breakdown of a Higgs mechanism. In this work, we derive the complex Ginzburg-Landau model from a non-Hermitian two-band BCS model via path integral and investigate its spontaneous symmetry breaking. We find that analog to the Higgs mechanism, the Meissner effect of the complex Ginzburg-Landau model also breaks down at the exceptional point while the gap parameters stay finite.
