论文标题
理论提案，以测量掺杂量子井中电子基态的谐振器诱导的修改
Theoretical proposals to measure resonator-induced modifications of the electronic ground-state in doped quantum wells
论文作者
论文摘要
最近对非扰动光 - 物质耦合物理学的兴趣导致了固态腔量子电动力学设置的发展，其中相互作用能与裸露能量相当。在这样的制度中，耦合系统的基态依赖于相互作用，并且预计将包含一系列虚拟激发，尽管有许多调查的对象，但仍未观察到。在本文中，我们研究了量子井中的虚拟电子激发如何修饰基本电荷分布，并提出了两种测量这种腔诱导的扰动的方法。我们考虑的第一种方法是基于使用局部缺陷状态在量子井中特定位置对电子总体的光谱映射。第二种方法利用了开尔文探针的光子等效物，以测量整个量子井的平均变化分布。我们发现使用当今或近距离技术可观察到这两种效果。因此，我们的结果为腔诱导的地面电子特性调制的调制提供了途径。
Recent interest in the physics of non-perturbative light-matter coupling led to the development of solid-state cavity quantum electrodynamics setups in which the interaction energies are comparable with the bare ones. In such a regime the ground state of the coupled system becomes interaction-dependent and is predicted to contain a population of virtual excitations which, notwithstanding having been object of many investigations, remain still unobserved. In this paper we investigate how virtual electronic excitations in quantum wells modify the ground-state charge distribution, and propose two methods to measure such a cavity-induced perturbation. The first approach we consider is based on spectroscopic mapping of the electronic population at a specific location in the quantum well using localised defect states. The second approach exploits instead the photonic equivalent of a Kelvin probe to measure the average change distribution across the quantum well. We find both effects observable with present-day or near-future technology. Our results thus provide a route toward a demonstration of cavity-induced modulation of ground-state electronic properties.
