论文标题
Landau Polaritons与Rashba和Zeeman联轴器的超级量子相变
Superradiant Quantum Phase transition for Landau Polaritons with Rashba and Zeeman couplings
论文作者
论文摘要
在存在Rashba旋转轨道和Zeeman耦合以及垂直磁场的情况下，我们开发了一种用于二维电子气体的空腔量子电动力学理论，并与空间不均匀的量子光子场耦合。我们表明，在原则上，可以通过纯净的Zeeman耦合来实现超级量子相变（SQPT），也称为光子凝结，但它需要非常小的（不现实的）量子孔宽度或极为微观的量子宽度或极为微调的有效土地因子，这使得两个Landau级别的水平相结合。 Landau水平的交叉点也可以由Rashba自旋轨道耦合诱导，它们可以促进sqpt，这可以为有效的Landé因子和填充因子的某些值而获得。
We develop a theory of cavity quantum electrodynamics for a two-dimensional electron gas in the presence of Rashba spin-orbit and Zeeman couplings and perpendicular magnetic field, coupled to a spatially nonuniform quantum photon field. We show that the superradiant quantum phase transition (SQPT), also known as photon condensation, can in principle occur through a pure in-plane Zeeman coupling, but it requires extremely small (unrealistic) quantum well widths or extremely fine tuning of the effective Landé factor which makes two Landau levels coincide. Landau level crossings can also be induced by the Rashba spin-orbit coupling and they promote the SQPT which can be obtained for certain values of the effective Landé factor and filling factors.
