Collaborative Research: High Fidelity Gates and Qubit Addressing in an Optical Lattice Quantum Processor

该研究项目带来了原子捕获，冷碰撞和量子控制方面的一些最新进展，以应对中性原子量子计算的两个主要挑战。主要目标是：（1）在新预测的陷阱诱导共振存在下，基于分子控制，证明了光学晶格中原子的通用双量子比特量子门。该小组将在光学晶格中的铯原子的系综实验中使用两粒子干涉测量法来详细评估门的性能，同时紧密协调的理论工作将开发新的和优化的量子逻辑协议;（2）设计用于光学晶格和其他陷阱几何结构中原子量子位的鲁棒和单独寻址的协议，这些量子位在衍射极限中无法解析。基本的方法是层析成像，利用光镊中的光位移将目标量子比特移动到与脉冲微波场共振的状态。控制理论将应用于设计与相邻量子位串扰最小的鲁棒门。这项工作涉及来自亚利桑那大学和新墨西哥州大学的一组研究人员。该研究将为量子信息科学（QIS）的知识基础做出重大贡献。学生将参与该项目的各个方面，包括培训，研究和成果的传播。该项目将保持和进一步加强参与研究小组之间的伙伴关系，并提供一个消除理论和实验之间人为划分的教育环境。教育和推广的一个重要工具是西南量子信息和技术（SQuInT）网络。SQuInT举办年度会议和一年两次的暑期学校和务虚会，主要集中在研究生和博士后。PI将从自己的研究小组之外寻找优秀的学生，特别是女性，少数民族和本科生，并赞助他们参加SQuInT会议。目前，SQuInT内部没有开展这类外联活动的机制。

This research project brings some of the latest advances in atom trapping, cold collisions and quantum control to bear on two major challenges of neutral atom quantum computing. The main goals are: (1) To demonstrate a universal two-qubit quantum gate for atoms in optical lattices based on molecular control in the presence of a newly predicted trap-induced resonance. The group will use two-particle interferometry in ensemble experiments with cesium atoms in optical lattices to evaluate the gate performance in detail, while a tightly coordinated theory effort will develop new and optimized quantum logic protocols; (2) To design protocols for robust and individual addressing of atomic qubits in optical lattices and other trap geometries that are not resolvable in the diffraction limit. The basic approach is tomographic, using the light shift in optical tweezers to shift the target qubit into resonance with a pulsed microwave field. Control theory will be applied to the design of robust gates with minimal cross talk to neighboring qubits. This work involves a team of researchers from the Universities of Arizona and New Mexico. The research will contribute significantly to the knowledge base of Quantum Information Science (QIS). Students will be involved in all aspects of the project, including training, research, and the dissemination of results. The project will maintain and further strengthen the partnership between the participating research groups, and provide an educational environment where the artificial division between theory and experiment is removed. An important tool for education and outreach is the Southwest Quantum Information and Technology (SQuInT) Network. SQuInT hosts an annual meeting and a biannual summer school and retreat focused primarily on graduate students and postdocs. The PIs will seek out exceptional students from outside their own research groups, in particular women, minorities and undergraduates, and sponsor their attendance at SQuInT meetings. There is currently no mechanism within SQuInT for carrying out this type of outreach.