论文标题
光子Weyl超材料中合成引力场引起的伪旋转的手性转运
Chiral transport of pseudo-spinors induced by synthetic gravitational field in photonic Weyl metamaterials
论文作者
论文摘要
Weyl颗粒在外部弯曲时空几何形状下表现出手性传输特性。这种效果称为手性重力效应，在量子场理论中起着重要作用。但是，自然界中没有真实的韦伊尔颗粒会阻碍这种有趣现象的观察。在本文中，我们表明，手性重力作用可以在具有空间控制的非局部性的Weyl超材料中表现出来。这种不均匀的调制导致Weyl锥分散体中的空间依赖组速度，这等效于为Weyl伪旋转引入弯曲的背景时空（或引力场）。合成引力场导致能量水平的量化，包括确定伪旋转器的手性转运特性的手性零阶能量模式（或简单的手性零模式）。不均匀的Weyl超材料提供了一个可实现的平台，用于研究Weyl颗粒与重力场之间的相互作用，从而可以在桌面实验中观察手性重力效应。
Weyl particles exhibit chiral transport property under external curved space-time geometry. This effect is called chiral gravitational effect, which plays an important role in quantum field theory. However, the absence of real Weyl particles in nature hinders the observation of such interesting phenomena. In this paper, we show that chiral gravitational effect can be manifested in Weyl metamaterials with spatially controlled nonlocality. This inhomogeneous modulation results in a spatially dependent group velocity in the Weyl cone dispersion, which is equivalent to introducing a curved background space-time (or gravitational field) for Weyl pseudo-spinors. The synthetic gravitational field leads to the quantization of energy levels, including chiral zeroth order energy modes (or simply chiral zero modes) that determine the chiral transport property of pseudo-spinors. The inhomogeneous Weyl metamaterial provides an experimentally realizable platform for investigating the interaction between Weyl particles and gravitational field, allowing for observation of chiral gravitational effect in table-top experiments.
