Quantum Control, Measurement, and Information in Atomic Spin Ensembles

信息处理(IP)是现代经济的核心。IP的前沿是一种新的范例--“量子信息处理”(QIP)--比特以光和物质的微观状态进行编码。量子力学的非直觉性，如叠加和纠缠，允许超越功率和任何现有的IP设备进行计算、通信和测量。这项拨款研究了原子气体冷却到超低温时QIP的实现。激光束充当了原子之间相互纠缠的量子数据线，也是读出信息的机制。对原子的控制进行了研究，以创建具有QIP所需的独特性质的新的量子态。这项工作是理论上的，是与实验室实验密切合作进行的。这项研究为量子信息科学的知识基础和这一高度交叉领域的未来科学家的培养做出了贡献。学生将参与该项目的各个方面，包括教育、研究和成果的传播。该项目是美国国家科学基金会资助的量子信息与控制中心(CQuIC)的组成部分。我们使用视频会议让CQuIC合作伙伴参与CQuIC的常规活动，包括每周的小组会议和研究研讨会，并通过年度研究务虚会加强初级和高级成员之间的联系。所有学生和高级人员积极参与西南量子信息技术(斜视)网络，包括年度研讨会。在其15年的历史中，斜视为QIS中的思想和结果交流提供了一个充满活力的途径，特别强调博士生、博士后和该领域的新研究人员。

Information processing (IP) is at the heart of the modern economy. The cutting edge of IP is a new paradigm -- "quantum information processing," (QIP) -- where bits are encoded in microscopic states of light and matter. The nonintuitive properties of quantum mechanics such as superposition and entanglement allow for computations, communications, and measurements beyond the power and any existing IP device. This grant studies the implementation of QIP with atomic gasses cooled to ultralow temperatures. Laser beams act as a quantum databus to entangle atoms with one another, and as a mechanism for reading out the information. The control of atoms is studied to create new quantum states that have the unique properties necessary for QIP. This work is theoretical, carried out in close collaboration with laboratory experiments. The research contributes to the knowledge base of quantum information science, and to the training of future scientists in this highly interdisciplinary field. Students will be involved in all aspects of the project, including education, research, and the dissemination of results. The project is an integral part of the NSF-funded Center for Quantum Information and Control (CQuIC). We use video conferencing to allow participation of CQuIC partners in the regular activities of CQuIC, including weekly group meetings and research seminars, and strengthen the connections between junior and senior members through an annual research retreat. All students and senior personnel actively participate in the Southwest Quantum Information Technology (SQuInT) network, including the annual workshop. During its 15-year history SQuInT has provided a vibrant avenue for exchange of ideas and results in QIS, with particular emphasis given to PhD students, postdocs, and new researchers in the field.