论文标题
部分可观测时空混沌系统的无模型预测
Non-Fermi-Liquid Behavior from Cavity Electromagnetic Vacuum Fluctuations at the Superradiant Transition
论文作者
论文摘要
我们研究了二维材料，其中电子与空腔的真空电磁场耦合。我们表明，在朝向宏观光子光子占用的型号的临界电磁波动的开始时，由光子与电子相互作用强烈阻尼的临界电磁波动可能导致不存在电子环粒。由于横向光子夫妇伴随到电子电流，因此非富液液体行为的出现很大程度上取决于晶格。特别是，我们发现在平方晶格中，电子光子散射的相空间以保留准粒子的方式减少，而在蜂窝晶格中，由于$ \ propto $ \ propto |ω| em^{2/3} $的非分析频率依赖性，后者被去除。标准腔探针可以允许测量负责非富特液体行为的过度阻尼临界电磁模式的特征频谱。
We study two-dimensional materials where electrons are coupled to the vacuum electromagnetic field of a cavity. We show that, at the onset of the superradiant phase transition towards a macroscopic photon occupation of the cavity, the critical electromagnetic fluctuations, consisting of photons strongly overdamped by their interaction with electrons, can in turn lead to the absence of electronic quasiparticles. Since transverse photons couple to the electronic current, the appearance of non-Fermi-Liquid behavior strongly depends on the lattice. In particular, we find that in a square lattice the phase space for electron-photon scattering is reduced in such a way to preserve the quasiparticles, while in a honeycomb lattice the latter are removed due to a non-analytical frequency dependence of the damping $\propto |ω|^{2/3}$. Standard cavity probes could allow to measure the characteristic frequency spectrum of the overdamped critical electromagnetic modes responsible for the non-Fermi-liquid behavior.
