Atom-Photon Entanglement and Functional Quantum Network Nodes with Atomic Ensembles

原子光子纠缠和具有原子系综的功能量子网络节点

• 批准号: 1521374
• 负责人: Mark Saffman
• 金额: $ 45万
• 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: 2015
• 资助国家: 美国
• 起止时间: 2015-08-01 至 2018-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1521374&HistoricalAwards=false
• 关键词: Atom; Photon; Entanglement; Functional; Quantum; Atom; Photon; Entanglement; Functional; Quantum

The development of quantum mechanical approaches to processing, storage, and transmission of information is being actively pursued around the world. Quantum processors are distinct from existing classical systems in that they harness unique features of quantum physics to enable beyond classical capabilities. These include the potential for efficiently solving currently intractable computational problems, for simulating complex physical systems in order to develop new materials, and the ability to transmit information securely between distant locations. One of the approaches being actively pursued is to use quantum bits (qubits) stored in neutral atoms for memory and processing and to use optical photons (particles of light) for long distance transmission of information. A necessary step is entanglement, that is where a single particle of light, a photon, and/or an atom can be correlated with another photon or another atom such that measuring the properties of one instantaneously affects the properties of the other even if they are not in the same location. While entanglement between atoms and photons has been demonstrated in many experiments what has not yet been achieved is the ability to combine atom-photon entanglement with atomic qubits that can process and store information. The major goal of this research is to demonstrate atom-photon entanglement and atom based quantum logic gates in a single system that can form the basis for future quantum networks. The research program will also contribute to the training of students 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 Madison community about the importance of physics to information technology, and the 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, faculty visits to local schools, and mentoring of high school students.Our technical approach is based on the use of small clouds of atoms with from 10-100 Rubidium atoms for the dual purpose of creating entanglement between atoms and photons, and as qubits in a small quantum processor. We will use long range interactions mediated by highly excited Rydberg states of atoms to create deterministic entanglement between qubits encoded in multi-atom ensembles and between ensembles and light. These capabilities will form the basis for efficient quantum repeater architectures needed for long distance distribution of entanglement and quantum networking.

在世界各地正在积极追求量子机械方法的处理，存储和传输。量子处理器与现有的古典系统不同，因为它们利用量子物理学的独特特征以超越经典能力。其中包括有效解决当前棘手的计算问题的潜力，用于模拟复杂的物理系统以开发新材料以及在遥远位置之间安全传输信息的能力。积极采用的一种方法是使用中性原子中存储的量子位（Qubits）进行记忆和加工，并使用光光子（光的颗粒）进行信息的长距离传输。一个必要的步骤是纠缠，这是一个光，光子和/或原子的单个粒子可以与另一个光子或另一个原子相关，以便测量一个一个的性质也会立即影响另一个特性，即使它们不在同一位置。虽然在许多实验中已经证明了原子和光子之间的纠缠尚未实现的是将原子 - 光子纠缠与可以处理和存储信息的原子量子台相结合的能力。这项研究的主要目的是在单个系统中证明原子 - 光子纠缠和基于原子的量子逻辑门，该系统可以为将来的量子网络构成基础。该研究计划还将为学生从事科学和工程职业的培训做出贡献。 来自不同背景的人将接受现代实验科学的教育和培训，并能够弥合物理学和信息科学之间的边界。培训将通过课程丰富和直接参与大学的研究计划进行培训。我们还将告知当地麦迪逊社区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。 在物理部门，实验室旅行，对当地学校的教师访问以及指导高中生的公众访问日，向公众推广。我们的技术方法是基于使用小云原子与10-100个rubidium原子的使用，用于在原子和光子之间创建纠缠的双重目的，以及在小量子上创建纠缠。我们将使用由高度激发的Rydberg原子状态介导的远距离相互作用，以在多原子集合中编码的量子位以及合奏和光线之间创建确定性的纠缠。这些功能将构成有效的量子中继器体系结构的基础，用于纠缠和量子网络的长距离分布。