Engineered Quantum Systems for Quantum Information

近年来，量子信息科学发展迅速，量子密码系统已经商业化。这些系统是量子信道的一个例子，主要用于分发量子信息。人们正在努力将这些量子通道与量子节点结合起来，以提供基本的内存、处理和路由能力。这些通道和节点的组合将创建一个完全的量子网络，使应用在今天根本不可能实现。连接简单量子处理节点的量子网络也是可扩展量子计算机的一种很有前途的架构。**在过去十年的大部分时间里，基于原子和光子的量子通道和节点的实现在性能和成就方面处于领先地位。随着电路量子电动力学（cQED）和微波量子光学（MQO）的出现，这种情况正在发生变化，芯片上的微波光子与由超导量子比特制成的“人造原子”强烈相互作用。**我提出的研究计划将探索和利用cQED工具，特别强调已被称为MQO的工具。我的研究将集中在回答基本的物理问题，以及为量子网络开发技术，奠定基础。该计划将有两个主要主题：1)传播非经典微波态和2)光子量子记忆和界面。** cQED和MQO的成功开发和应用将对未来十年的通信和信息技术产生重大影响。例如，混合量子接口将是一项突破性技术，它可以将量子信息各个领域的最佳方法结合起来。与量子接口一起，该项目开发的量子节点将为未来的量子网络技术奠定基础，并有可能在21世纪彻底改变信息技术。

In recent years, quantum information science has advanced rapidly, with quantum cryptography systems already commercially available. These systems are an example of quantum channels, serving mainly to distribute quantum information. There is a significant effort underway to combine these quantum channels with quantum nodes that would offer basic memory, processing and routing capability. The combination of these channels and nodes would create a fully quantum network, enabling applications simply impossible today. Quantum networks connecting simple quantum processing nodes are also a promising architecture for a scalable quantum computer. ** For most of the decade, implementations of quantum channels and nodes based on atoms and optical photons have led in terms of performance and achievement. This is now changing with the advent of circuit quantum electrodynamics (cQED) and microwave quantum optics (MQO), where microwave photons on-chip interact strongly with "artificial atoms" made from superconducting qubits. ** My proposed research program will explore and exploit cQED tools with particular emphasis on what has become known as MQO. My research will focus both on answering fundamental physical questions as well as developing technology for quantum networks, laying their foundations. The program will have two major themes: 1) Propagating Nonclassical Microwave States and 2) Photonic Quantum Memories and Interfaces. ** The successful development and application of cQED and MQO would have a significant impact on communications and information technology in the next decade. For instance, a hybrid quantum interface would be a breakthrough technology, allowing for the combination of the best approaches from various fields of quantum information. Along with the quantum interface, the quantum nodes developed in this project will lay the foundations of future quantum network technology, with the potential to revolutionize information technology in the 21st century.