NIRT: Integrated Nanophotonics for Quantum Computation and Quantum Information Processing

这个项目是南加州大学和犹他大学教师之间的合作，旨在开发用于芯片级量子信息处理的关键纳米光子组件，并开发改进的量子信息处理算法和该技术的系统级实现。该计划是纳米结构，新现象和量子控制领域的NIRT。该计划的目标是开发发射、操纵和探测单量子的技术。只有单光子源、单光子探测器、分束器和移相器是建立高效量子计算门所必需的。PI建议使用一种通用的芯片级、磷化铟兼容的方法来改进这些组件的最新技术。南加州大学开发的单光子源将与德克萨斯大学奥斯汀分校的单光子探测器工作共享，同样，德克萨斯大学奥斯汀分校开发的单光子探测器将与南加州大学的单光子源工作共享。该合作还将确保器件设计能够兼容最终集成到单个InP基板上。智力优势：该计划将研究光学和电泵浦，单模，光子晶体单光子源，其中包含1.5 um附近的单个量子点。这些光源将耦合到光子晶体波导，以促进芯片级光学处理。将设计电子电路来驱动这些单光子源，感知光子发射，并产生可用于后续门定时的触发信号。单光子探测器将采用与InP相匹配的InGaAs/InAlAs晶格制造的盖革模式雪崩光电二极管。虽然长期目标是开发适用于量子计算的芯片级量子门技术，但该技术将在量子密码学中找到更近期的应用。更广泛的影响：该项目的研究方向也将影响南加州大学和德克萨斯大学的课堂教学。这个团队的研究人员在拟议的四年计划中教授20门不同的本科和研究生课程。这些研究小组也有本科生的参与，项目负责人希望有6名本科生参与这个项目。

0507270O'BrienThis program is a collaborative effort between faculty members at USC and UTAustin to develop the key nanophotonic components for chip-scale quantum informationprocessing and to develop improved quantum information processing algorithms andsystem level implementations of this technology. The proposed program is a NIRT in thearea of Nanoscale Structures, Novel Phenomena, and Quantum Control. The goal of thisprogram is to develop technology to emit, manipulate, and detect single quanta. Onlysingle-photon sources, single-photon detectors, beamsplitters, and phase shifters arenecessary in order to build gates for efficient quantum computation. The PI proposes toimprove the state-of-the-art in these components using a common chip-scale, indiumphosphide compatible, approach. Single-photon sources developed at USC will beshared with the single-photon detector effort at UT Austin, and similarly, the singlephotondetectors developed at UT Austin will be shared with the single-photon sourceeffort at USC. The collaboration will also ensure that the device designs will becompatible with the eventual integration onto a single InP substrate.Intellectual Merit: This proposed program will investigate both optically and electrically-pumped,single-mode, photonic crystal single-photon sources incorporating a single quantum dotemitting near 1.5 um. These sources will be coupled to a photonic crystal waveguide tofacilitate chip-scale optical processing. Electronic circuits will be designed to drive thesesingle-photon sources, sense the photon emission, and generate a trigger signal that canbe used in subsequent gate timing. The single-photon detectors will be developed usingGeiger mode avalanche photodiodes fabricated in InGaAs/InAlAs lattice matched to InP.While the long term goal is to develop a chip scale quantum gate technology applicableto quantum computation, this technology will find much nearer term applications inquantum cryptography.Broader Impacts: The research directions of this program will also impact the classroom teaching atboth USC and the University of Texas. The investigators on this team teach 20 differentundergraduate and graduate courses over the course of the proposed four-year program.There is also ongoing undergraduate participation in these research groups and the PI expects6 undergraduates to be involved in this project.