Multipartite Entanglement, Multimode Squeezing, and Non-Gaussian Light from Quantum Cascades and Concurrences

本实验主要研究利用基于量子级联和量子并发的光学参量振荡器(OPO)产生多体纠缠、多模压缩和非高斯光。这种状态的实验实现现在看起来是触手可及的，也是这个项目的目标之一。重合非线性的另一种形式是级联，它长期以来一直以产生非线性相移的能力而闻名。该计划将探索此类系统高效实现有效三阶非线性并产生具有非高斯Wigner函数的量子光的能力，这对于利用连续变量和明亮光束实现纠缠净化等非平凡量子信息协议具有重要意义。该项目的更广泛影响涉及学生教育和高级课程开发，以及与工程学教师的合作。

This experimental research program focuses on the generation of multipartite entanglement, multimode squeezing, and non-Gaussian light by use of optical parametric oscillators (OPO) based on quantum cascades and quantum concurrences. The experimental realization of such states appears now well within reach and is one of the objectives of this project. Another flavor of coincident nonlinearities is cascading, long known for its ability to create nonlinear phase shifts. The program will probe the ability of such systems to efficiently realize effective third-order nonlinearities and generate quantum light with a non-Gaussian Wigner function, which is of great interest for implementing nontrivial quantum information protocols, such as entanglement purification, using continuous variables and bright beams. The broader impact of the program involves education of students and advanced course development as well as collaboration with engineering faculty.