论文标题
用空腔辅助动力学自旋轨道耦合的超级级相变
Superradiant phase transition with cavity assisted dynamical spin-orbit coupling
论文作者
论文摘要
上级相变是一种重要的量子现象，该现象显示了基于原子和空腔模式之间的耦合的集体激发。自旋轨道耦合是另一种量子效应，它是由原子内部自由度和质量中心动量的相互作用引起的。在这项工作中，我们考虑了腔体辅助动力学自旋轨道耦合，该耦合来自这两种效果的组合。它可以诱导一系列有趣的量子现象，例如平坦光谱和激发能谱的奇异性，围绕量子相变的临界点。我们进一步讨论了原子衰减和非线性耦合与相图的影响。原子衰减抑制了相图的奇异性，而非线性耦合会破坏相变的对称特性。我们的工作提供了在这种动态多体系统中研究丰富量子现象的理论方法。
Superradiant phase transition represents an important quantum phenomenon that shows the collective excitations based on the coupling between atoms and cavity modes. The spin-orbit coupling is another quantum effect which induced from the interaction of the atom internal degrees of freedom and momentum of center-of-mass. In this work, we consider the cavity assisted dynamical spin-orbit coupling which comes from the combination of these two effects. It can induce a series of interesting quantum phenomena, such as the flat spectrum and the singularity of the excitation energy spectrum around the critical point of quantum phase transition. We further discuss the influence of atom decay and nonlinear coupling to the phase diagram. The atom decay suppresses the singularity of the phase diagram and the nonlinear coupling can break the symmetric properties of the phase transition. Our work provide the theoretical methods to research the rich quantum phenomena in this dynamic many-body systems.
