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式--“量子信息处理”（QIP）--比特被编码在光和物质的微观状态中。 量子力学的非直观性质，如叠加和纠缠，允许计算，通信和测量超越电源和任何现有的IP设备。 这项资助研究了原子气体冷却到超低温的QIP的实现。 激光束就像一个量子数据总线，使原子相互纠缠在一起，并作为一种阅读信息的机制。 研究原子的控制以创建具有QIP所需的独特性质的新量子态。 这项工作是理论性的，与实验室实验密切合作进行。 这项研究有助于量子信息科学的知识基础，并有助于在这个高度跨学科的领域培养未来的科学家。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NSF资助的量子信息与控制中心（CQuIC）的一个组成部分。我们使用视频会议让CQuIC的合作伙伴参与CQuIC的定期活动，包括每周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（SQuInT）网络，包括年度研讨会。在其15年的历史中，SQuInT为QIS的思想和成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.