Study of Passive, Cavity-Mediated Gates for Deterministic Quantum Logic with Single Photons

该项目的目标是对某些设备进行理论研究，这些设备已被提议作为光子量子计算机的可能构建模块;也就是说，量子计算机的信息由单光子携带。 所考虑的器件涉及光学微腔中的单个原子或量子点。 它们的设计比以前的设计有了很大的改进，因为它们的功耗要求很低，故障率也很低。 在实验可行性和最佳性能潜力方面，将研究几种不同的配置。世界各地的许多小组都在研究光子量子计算机，这项研究将对这些工作产生直接影响。 此外，即使全光量子计算机最终被证明不是最佳选择，光子几乎肯定仍将用于未来量子网络节点之间的通信（就像它们现在在商业上可用的量子密码系统中一样），这里要研究的设备在这样的网络中非常有用，可以提供内存存储并允许纠错操作。

The goal of this project is the theoretical study of certain devices that have been proposed as possible building blocks for photonic quantum computers; that is, quantum computers where the information is carried by single photons. The devices considered involve a single atom or quantum dot in an optical microcavity. Their design is a substantial improvement over previous designs because of their very low power requirements and potentially very low failure rate. Several different configurations will be studied as regards experimental feasibility and potential for best performance.Many groups around the world are working on photonic quantum computers, and this research will have a direct impact on such work. Moreover, even if an all-optical quantum computer eventually turned out not to be the best choice, photons will almost certainly still be used for communication between the nodes of quantum networks in the future (as they are now in commercially available quantum cryptography systems), and the devices to be studied here would be very useful in such networks, to provide memory storage and allow for error correction operations.