论文标题
量子态振幅的复合阶段的光学控制
Optical control of the complex phase of a quantum ground state amplitude
论文作者
论文摘要
我们讨论如何使用两级量子系统的相干驱动来诱导基础状态的复杂阶段，并讨论其几何和动态贡献。尽管波函数的全局阶段没有物理意义，但两级子空间中的相干动力学提供了相对阶段，并且是较大系统中更先进的动力学的必不可少的基础。在这方面，我们注意到，必须谨慎对相位动力学的直观说明，因为这取决于所应用的相互作用图片。为了减轻实际分析中的歧义性，我们建议将Bloch球体图片与复杂平面中的基态振幅所采取的路径进行补充，我们展示了如何在三级Lambda系统，四级级别的三脚架系统和开放量子系统和开放量子系统和开放量子系统中探索的两级纯状态动力学如何成为研究动力学的起点。
We discuss how coherent driving of a two-level quantum system can be used to induce a complex phase on the ground state and we discuss its geometric and dynamic contributions. While the global phase of a wave function has no physical significance, coherent dynamics in a two-level subspace provides relative phases and is an essential building block for more advanced dynamics in larger systems. In this regard, we note that one must be careful with intuitive accounts of the phase dynamics as it depends on the interaction picture applied. To mitigate ambiguities in practical analyses, we suggest to complement the Bloch sphere picture with the path taken by the ground state amplitude in the complex plane, and we show how the two-level pure state dynamics can serve as a starting point for the study of the dynamics explored in three-level lambda systems, four-level tripod systems, and open quantum systems.
