Robust Matter-Light Entanglement Generation and Distribution

鲁棒的物质-光纠缠的产生和分布

• 批准号: 1417059
• 负责人: Alexander Kuzmich
• 金额: $ 53万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-09-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1417059&HistoricalAwards=false
• 关键词: Robust; Matter; Light; Entanglement; Generation

This work involves research and education on a set of topics in atomic physics and quantum optics. The main objective of the project is to develop new methods for the generation, storage, and distribution of quantum mechanical entanglement utilizing photons and ultra-cold atoms. The approach employs interactions of ultra-cold atoms excited into Rydberg states for entanglement generation while ground atomic levels are used for information storage. The strength of the atom-light interactions will be increased by placing the atoms between highly polished mirrors of an optical cavity, while confining the atoms to laser-generated optical lattices and cooling them to ultra-low temperatures. The planned activity is expected to result in the development of a new generation of capabilities for the creation, distribution and storage of entangled quantum states and contribute to future implementations of distributed quantum computing. Additionally, efficient production of massively entangled states will advance quantum-enhanced technologies. This research will continue a program of investigating the generation, storage, and distribution of quantum information, using individual photons and trapped ultra-cold atoms. The entanglement of spin-wave hyperfine qubits to optical qubits encoded in the polarization, spatial or frequency degrees of freedom of single photons, as well as entanglement of two remote spin-wave qubits, and single-photon wavelength conversion between the near-infrared and the telecom has been previously demonstrated. Most recently, quantum memory times have been extended beyond 10 seconds, while strong interactions of atomic Rydberg levels have been employed for the generation of single photons, many-body quantum states, and matter-light entanglement. This opens a path toward functional quantum networking architectures of superior scaling. The following set of goals will be explored: (i) tight, three-dimensional, state-insensitive confinement of ground and Rydberg atoms; (ii) Rydberg quantum gates between qubits encoded in Rubidium isotopic mixtures; (iii) scalable multi-qubit atomic entangled states by sequential generation of entangled qubit pairs and triples, photon interferences and light-memory quantum state mappings; (iv) storage of multi-qubit entangled quantum states with second-scale lifetimes. The planned activity will expedite the development of a new generation of capabilities for the creation, distribution and storage of multi-qubit entangled states and contributes to future implementations of long-distance quantum repeaters and distributed quantum computing. Moreover efficient production of multi-qubit entangled states will impact fundamental physics investigations and advance quantum-enhanced technologies.

这项工作涉及有关原子物理和量子光学主题的研究和教育。该项目的主要目的是开发利用光子和超冷原子的量子机械纠缠的生成，存储和分布的新方法。 该方法采用激发到rydberg状态的超冷原子的相互作用进行纠缠，而地面原子水平用于信息存储。通过将原子放置在光腔的高度抛光镜之间，同时将原子限制在激光生成的光学晶格中并将其冷却到超低温度，将增加原子光相互作用的强度。预计计划的活动将导致新一代能力的创建，分配和存储纠缠量子状态，并为分布式量子计算的未来实施做出贡献。此外，有效的大规模纠缠状态生产将推进量子增强技术。这项研究将继续使用单个光子和捕获的超冷原子来调查量子信息的产生，存储和分布。单个光子自由度的极化，空间或频率程度以及两个远程自旋波量子的纠缠以及近交和电信之间的两个远程自旋波长转换的纠缠与单个光子量子和两个远程旋转波长转换的纠缠。最近，量子记忆时间已超过10秒，而原子Rydberg水平的强相互作用已用于产生单个光子，多体量子状态和物质纠缠。这为高级缩放的功能量子网络体系结构打开了一条路径。将探讨以下一组目标：（i）地面和瑞德伯格原子的紧密，三维，不敏感的限制； （ii）在rubidium同位素混合物中编码的量子位之间的rydberg量子门； （iii）可扩展的多量原子纠缠状态，通过顺序生成纠缠的量子对和三元组，光子干扰和光内存量子态映射； （iv）存储具有第二尺度寿命的多Qubit纠缠量子状态。计划中的活动将加快发展新一代能力的发展，以创建，分发和存储多Qubited状态，并为将来的长距离量子中继器和分布式量子计算的实施做出贡献。此外，有效生产多Qubit纠缠状态将影响基本的物理研究并提高量子增强技术。