Hybrid Optical Approach for Quantum Information Applications

该项目旨在改善光学系统的量子信息处理。 在这篇论文中，PI将结合先前研究的线性和非线性量子逻辑gares的特点，从理论上研究光子qbit的混合方法。 量子通信和量子计算的新方法有望从这项工作中产生。 这一点很重要，因为它将为能够提高国家安全和经济竞争力的技术奠定基础。它还将推动量子信息科学领域的发展。 该项目的更广泛的影响包括对研究生进行理论量子光学方法的培训，并为将成为下一代科学家的本科生提供研究经验。 为非科学家举办的公开讲座和为高中生举办的几项科学推广活动也是该项目的一部分。 利用光量子（光子量子比特）进行量子信息处理是一个很有前途的新技术方向。 然而，用光子量子比特制作量子逻辑门是具有挑战性的。 该奖项是对混合光学方法的理论研究，该方法结合了先前研究的线性和非线性量子逻辑门的最佳功能。线性光学技术，如后选择，预报，前馈控制将被应用于非线性器件，以减少门错误率。虽然所得到的器件在本质上是概率性的，但使用非线性效应可以增加光子量子比特门的成功概率。这种方法将导致具有低错误率和高成功概率的鲁棒设备，这是量子信息处理进一步发展所需要的。除了量子逻辑门，该团队还将研究专门为量子通信任务设计的混合设备，例如纠缠分布。作为该项目的一部分，该团队还将研究概率量子克隆的新技术。 该奖项反映了NSF的法定使命，通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This project aims to improve quantum information processing with optical systems. In it the PI will investigate theoretically a hybrid approach to photonic qbits by combining features of previously studied linear and nonlinear quantum logic gares. New approaches for quantum communication and quantum computation are expected to result from the work. This is important because it will lay the foundation for technologies that can improve national security and economic competitiveness. It will also advance the field of quantum information science. Broader impacts of this project include training of a graduate student in theoretical quantum optics methods and providing research experience for undergraduate students who will become part of the next generation of scientists. Public lectures for non-scientists, and several science outreach activities for high-school students are also part of this project. Quantum information processing with quanta of light (photonic qubits) is a promising direction for new technologies. However, it is challenging to make quantum logic gates with photonic qubits. This award is for a theoretical investigation of a hybrid optical approach that combines the best features of the linear and nonlinear quantum logic gates previously studied. Linear optical techniques, such as postselection, heralding, and feed-forward control will be applied to nonlinear devices to reduce the gate error rates. Although the resulting devices will be probabilistic in nature, the use of nonlinear effects can increase the probability of success for photonic qubit gates. This approach will lead to robust devices with a low error rate and a high probability of success, as needed for further advances in quantum information processing. In addition to quantum logic gates, this team will also investigate hybrid devices that are specifically designed for quantum communications tasks, such as entanglement distribution. As part of this project, this team will also investigate new techniques for probabilistic quantum cloning. This will advance the progress of science by providing a deeper understanding of quantum information processing with photonic qubits.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.