SGER: Compact waveguide based source of quadrature squeezing and entanglement

这个SGER研究项目将展示一个紧凑的压缩和纠缠光源，用于量子通信和测量。近年来，由于量子信息和通信作为研究和发展的主要领域的出现，非经典光的应用变得越来越重要。本文提出的研究将基于嵌入在优化的自成像环形谐振器中的KNbO3波导中的二次谐波产生，产生紧凑的连续可变压缩和纠缠源。这个项目有几个新颖的特点，使它区别于其他现有的研究。所有先前的纠缠源的演示都使用了参数下转换。二次谐波产生的空间压缩和纠缠已经在腔内和单通道几何中得到了预测，但从未观察到。谐波产生的使用大大拓宽了应用范围，因为它将使量子源在新的波长上可用。提出的活动的智力价值在于研究和展示X(2)非线性相互作用中的空间非经典光和纠缠。PI将研究空间调制不稳定性导致的压缩和纠缠产生的新机制。将量子光学效应扩展到空间领域是研究非经典领域的一个重要领域，并可能在量子信息传输和精密测量方面实现新的应用。拟议活动的更广泛影响将是进一步提高PI操纵和控制光场的能力。这一努力的成功可能会产生新的紧凑的非经典光源，用于量子通信和量子限制测量。这项将在威斯康星大学麦迪逊分校进行的研究将使本科生和研究生接触到最先进的技术和工具，并培养他们为社会的技术和科学发展做出贡献。

0533472SaffmanThis SGER research project will demonstrate a compact source of squeezed and entangled light forapplications in quantum communication and measurement. Applications of non-classical light have takenon increased importance in recent years due to the emergence of quantum information and communicationas major areas of research and development. The research proposed here will result in compact sources ofcontinuous variable squeezing and entanglement based on second harmonic generation in a KNbO3 waveguide embedded in an optimized self-imaging ring resonator. There are several novel features of this project that distinguish it from other existing research. All prior demonstrations of entangled sources have used parametric downconversion. Spatial squeezing and entanglement in second harmonic generation have been predicted in intracavity and single pass geometries, but never observed. The use of harmonic generation greatly widens the scope of applications since it will make quantum sources available at new wavelengths.The intellectual merit of the proposed activity is the study and demonstration of spatial nonclassicallight and entanglement in X(2) nonlinear interactions. The PI will investigate a new mechanism of squeezing and entanglement generation that is the result of a spatial modulational instability. Extension of quantum optical effects to the spatial domain is of fundamental interest in the study of non-classical fields and may enable new applications in quantum information transmission, and precision measurements.The broader impact of the proposed activity will be in the furthering of the PI's ability to manipulate andcontrol optical fields. Success in this endeavor may result in new compact sources of nonclassical light forapplications in quantum communication and quantum limited measurements. The research to be performedat The University of Wisconsin - Madison will expose undergraduate and graduate students to state of theart techniques and tools, and train them to contribute to the technological and scientific development ofsociety.