Rydberg Blockaded Ensemble Qubits and Atom-Photon Quantum Interfaces

里德堡封锁系综量子位和原子光子量子接口

• 批准号: 1104531
• 负责人: Mark Saffman
• 金额: $ 61万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1104531&HistoricalAwards=false
• 关键词: Rydberg; Blockaded; Ensemble; Qubits; Atom

Quantum computers hold the promise of transformative improvements to our ability to solve hard data processing problems by taking advantage of quantum mechanical phenomena including superposition states and entanglement. This project will continue experimental development of a quantum information processor based on qubits encoded in Rubidium atoms, and quantum logic gates that are mediated by interactions between highly excited atomic Rydberg states. The experimental approach uses laser cooled Rubidium atoms stored in optical traps. Ensemble qubits that use many atoms instead of one for storing quantum information have advantageous properties for transmitting quantum information. In this project ensemble qubits subject to Rydberg atom interactions will be studied and their use for single atom loading, fast quantum measurements, and efficient light-atom quantum interfaces will be demonstrated. The broader impacts of this work are twofold. First, this research will contribute to the development of a large scale quantum processor that exceeds the capabilities of conventional classical computers. The availability of such a device would have far reaching impact on numerical mathematics, information security, and problems in the simulation of quantum systems related to the development of new, technologically valuable materials. Second, the research program will contribute to the training of students and postdoctoral researchers for careers in science and engineering. People from diverse backgrounds will be educated and trained in modern experimental science, and will be equipped to bridge the boundary between physics and information science. Training will occur via curriculum enrichments, and through direct participation in the University based research program. We will also inform the local community about the importance of physics to information technology, and new developments in the area of quantum information science. Outreach to the public will be facilitated by public visiting days at the Physics department, laboratory tours, and faculty visits to local schools.

量子计算机有望通过利用包括叠加态和纠缠在内的量子力学现象，对我们解决困难数据处理问题的能力进行革命性的改进。该项目将继续进行基于Rb原子中编码的量子比特的量子信息处理器的实验开发，以及由高激发原子里德堡态之间的相互作用介导的量子逻辑门。实验方法使用存储在光学陷阱中的激光冷却的Rb原子。使用多个原子而不是一个原子来存储量子信息的系综量子比特在传输量子信息方面具有有利的性质。在这个项目中，我们将研究Rydberg原子相互作用下的系综量子比特，并展示它们在单原子加载、快速量子测量和高效光原子量子接口中的应用。这项工作的更广泛影响是双重的。首先，这项研究将有助于开发超越传统经典计算机能力的大规模量子处理器。这种设备的可用性将对数值数学、信息安全以及与开发具有技术价值的新材料有关的量子系统模拟问题产生深远影响。其次，该研究计划将有助于培养学生和博士后研究人员从事科学和工程工作。来自不同背景的人将接受现代实验科学的教育和培训，并将具备在物理学和信息科学之间架起桥梁的能力。培训将通过丰富课程和直接参与基于大学的研究计划进行。我们还将向当地社区介绍物理学对信息技术的重要性，以及量子信息科学领域的新发展。将通过物理系的公众探访日、实验室参观和对当地学校的教职员工访问来促进与公众的接触。